ORIGINAL_ARTICLE
حل نیمه تحلیلی تیر بتنی خودترمیم در چارچوب مکانیک محیط پیوسته آسیب-ترمیم
دراین مقاله مدلسازی نیمهتحلیلی برای پیشبینی رفتار تیربتنی خودترمیم ارائه شده است. دراین راستا یک مدل ساختاری برای پیشبینی رفتارموادخودترمیم استفاده شده است. رشد متغیرهای آسیب و ترمیم به عنوان متغیرهای داخلی به دست آمده و سطوح آسیب و ترمیم کششی و فشاری برای تشخیص رفتار آسیب و ترمیم از رفتارالاستیک، معرفی شده است. صحتسنجی پاسخ با حل یک مثال برای تیرتحت بارگذاری گسترده انجام شده است. نتایج بدست آمده نشان دادند که برای هندسه بیان شده تیربتنی خودترمیم 21٪ ازتیر بتنی ساده باربیشتری را تحمل میکند، همچنین خیزتیر خودترمیم تابارگذاری نهایی 27٪ بزرگتراز بارگذاری نهایی تیر بتنی ساده میباشد.
https://jmep.isme.ir/article_239625_2c36c54b19df79ac508767004ba35860.pdf
2020-11-21
6
29
10.30506/ijmep.2020.91515.1449
مکانیک محیط پیوسته آسیب-ترمیم
بتن خودترمیم
مدل الاستیک آسیب-ترمیم
تیر بتنی
انرژی پتانسیل گیبس
امین
کاظمی
amin.kazemi@ut.ac.ir
1
دانشجوی دکترا، دانشکده مهندسی مکانیک، دانشگاه تهران
AUTHOR
مصطفی
باغانی
baghani@ut.ac.ir
2
نویسنده مسئول، دانشیار، دانشکده مهندسی مکانیک، دانشگاه تهران
LEAD_AUTHOR
حمید
شهسواری
hamid.shahal@gmail.com
3
دکترا، دانشکده مهندسی مکانیک، دانشگاه صنعتی شریف
AUTHOR
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ORIGINAL_ARTICLE
تحلیل ناپایداری دینامیکی تیر ساندویچی با هسته انعطافپذیر بر روی بستر الاستیک
در این پژوهش، اثرات بارمحوری نوسانی و بستر الاستیک بر روی ناپایداری دینامیکی تیر ساندویچی سه لایه مطالعه شده است. با استفاده از تئوری مرتبه بالای تیرهای ساندویچی، معادلات حاکم بر تیر ساندویچی استخراج گردید. نواحی ناپایداری دینامیکی با استفاده از روش بالوتین با شرایط تکیهگاهی ساده استخراجشده است. نتایج روش حاضر با نتایج سایر مراجع مقایسه شدهاند. مقایسه نتایج تحلیلی با شبیهسازی تطابق مناسبی را نشان دادند. در پایان اثر پارامترهای مختلف بر ناپایداری دینامیکی، فرکانس طبیعی و فرکانس تحریک بررسیشده است. با افزایش ضریب الاستیک بستر، فرکانسهای طبیعی و تحریک افزایش و ناپایداری تیر کاهشیافته است.
https://jmep.isme.ir/article_46418_ea2fb3702a971281228f4d43a9be2c31.pdf
2020-11-21
30
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10.30506/ijmep.2020.97422.1486
ناپایداری دینامیکی
اصل همیلتون
روش بالوتین
معادله متیو
بستر الاستیک
غلامرضا
عسگری
ghreza.asgari@gmail.com
1
دانشجوی دکترا، دانشکده مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران
AUTHOR
غلامحسن
پایگانه
g.payganeh@sru.ac.ir
2
نویسنده مسئول، دانشیار، دانشکده مهندسی مکانیک، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران
LEAD_AUTHOR
کرامت
ملک زاده فرد
kmalekzadeh@mut.ac.ir
3
استاد، دانشکده مهندسی مکانیک، دانشگاه صنعتی مالک اشتر، تهران، ایران
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ORIGINAL_ARTICLE
تعیین موقعیت ماهواره با استفاده از داده GPS و فیلتر کالمن مکعبی
در این مقاله معادلات حرکت ماهواره بررسی میگردد و سپس با استفاده از مشاهدات GPS، از فیلترهـای غیرخطـی کالمـن توسعه یافته و کالمن مکعبی به منظور تعیین مدار ماهواره استفاده میشود. نتایج شبیهسازی و خطای RMS موقعیت نشان میدهد فیلتر کالمن مکعبی در مقایـسه با فیلتر کالمن توسعه یافته عملکرد بهتری (تا حدود 50 درصد) در تعیین سرعت در راستای y و z ماهواره دارد. درصد بهبود خطا نسبی در بخش موقعیت برای هر دو فیلتر تقریبا مشابه هم است هرچند در این بخش هم عملکرد فیلتر کالمن مکعبی بهتر بوده است.
https://jmep.isme.ir/article_46389_c1703f7a940fec8ac4ce70a43ed20a20.pdf
2020-11-21
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79
10.30506/ijmep.2020.97936.1488
موقعیت ماهواره
سیستم غیرخطی
فیلتر کالمن توسعه یافته
فیلتر کالمن مکعبی
داده GPS
سید موسی
ایتی
m.ayati@ut.ac.ir
1
نویسنده مسئول، دانشیار، دانشکده مهندسی مکانیک، دانشگاه تهران، تهران
LEAD_AUTHOR
داود
رضائی
dd.rezaei@gmail.com
2
کارشناسی، عضو هیات علمی، پژوهشکده سامانههای ماهواره، پژوهشگاه فضایی ایران
AUTHOR
محمد حسن
سیامک
siyamak@sh.com
3
دانشجویکارشناسیارشد، مهندسی مکانیک،دانشگاه صنعتی شریف، تهران
AUTHOR
[1] Erdoğan, E., ''GPS-based Real-time Orbit Determination of Artificial Satellites using
1
Kalman, Particle, Unscented Kalman and H-Infinity Filter'', M.Sc. Thesis School of
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Naturaland Applied Sciences, Middle East Technical University, Ankara, Turkey, (2011).
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[2] Hauschild A., and Montenbruck O., “Kalman-filter-based GPS Clock Estimation for Near
4
Real-time Positioning”, GPS Solut., Vol. 13, No. 3, pp. 173-182, (2009).
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[3] Sutton, E., “Review of Global Positioning System: Signals, Measurements, and
6
Performance”, AIAA J., Vol. 40, No. 8, pp. 1693, (2002).
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[4] Bowman B., Tobiska, W. K., Marcos, F., Huang, C., Lin, C., and Burke, W., “A New
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Empirical Thermospheric Density Model JB2008 using New Solar and Geomagnetic
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Indices”, in AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu,
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Hawaii, pp. 18-21 (2008).
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[5] Karslioglu, M. O., “An interactive Program for GPS-based Dynamic Orbit Determination
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of Small Satellites”, Comput. Geosci., Vol. 31, No. 3, pp. 309-317, (2005).
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[6] Chiaradia, A. P. M., Kuga, H. K., and Prado, A., “Single Frequency GPS Measurements in
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Real-time Artificial Satellite Orbit Determination”, Acta Astronaut., Vol. 53, No. 2, pp.
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123-133, (2003).
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[7] Julier, S. J., and Uhlmann, J. K., “Unscented Filtering and Nonlinear Estimation”, Proc.
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[8] Sierociuk, D., and Dzieliński, A., “Fractional Kalman Filter Algorithm for the States,
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Parameters and Order of Fractional System Estimation”, Int. J. Appl. Math. Comput. Sci.,
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[9] Ayati, M., and Khaloozadeh, H., “A Stable Adaptive Synchronization Scheme for Uncertain
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Chaotic Systems Via Observer”, Chaos, Solitons & Fractals, Vol. 42, No. 4, pp. 2473-2483,
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[10] Vatankhah, R., Karami, F., and Salarieh, H., “Observer-based Vibration Control of Nonclassical
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Microcantilevers using Extended Kalman Filters”, Appl. Math. Model., Vol. 39,
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[11] Arasaratnam, I., and Haykin, S., “Cubature Kalman Filters”, IEEE Trans. Automat. Contr.,
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[12] Chitralekha, S. B., Prakash, J., Raghavan, H., Gopaluni, R. B, and Shah S. L., “A
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Comparison of Simultaneous State and Parameter Estimation Schemes for a Continuous
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Fermentor Reactor”, J. Process Control, Vol. 20, No. 8, pp. 934-943, (2010).
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[13] Gadsden, S. A., Al-Shabi, M., Arasaratnam, I., and Habibi, S. R., “Combined Cubature
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Kalman and Smooth Variable Structure Filtering: A Robust Nonlinear Estimation
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Strategy”, Signal Processing, Vol. 96, pp. 290-299, (2014).
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[14] Vallado, D. A., and McClain, W.D., “Fundamentals of Astrodynamics and Applications”,
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Microcosm Press/Springer, 3rd ed., Vol. 12, New York, USA, (2007).
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[15] Rossouw, N. C., “A GPS-Based On-board Orbit Propagator for Low Earth-orbiting
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CubeSats”, Stellenbosch: Stellenbosch University, South Africa, (2015).
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[16] Arasaratnam, I., Haykin, S., and Hurd, T. R., “Cubature Kalman Filtering for Continuous-
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Discrete Systems: Theory and Simulations”, IEEE Trans. Signal Process., Vol. 58, No. 10,
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pp. 4977-4993, (2010).
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[17] Havlicek, M., Friston, K. J., Jan, J., Brazdil, M., and Calhoun, V. D., “Dynamic Modeling
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of Neuronal Responses in FMRI using Cubature Kalman Filtering”, Neuroimage, Vol. 56,
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No. 4, pp. 2109-2128, (2011).
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[18] Wertz, J.R., Everett, D.F., and Puschell, J.J., “Space Mission Engineering: The New
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SMAD”, Microcosm Press, Vol. 28, Hawthorne, Califirnia, USA, (2011).
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[19] Garcia, R.V., Pardal, P.C., Kuga, H.K., and Zanardi, M.C., “Nonlinear Filtering for
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Sequential Spacecraft Attitude Estimation with Real Data: Cubature Kalman Filter,
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Unscented Kalman Filter and Extended Kalman Filter”, Advances in Space Research, Vol.
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63, No. 2, pp. 1038-1050, (2019).
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[20] Kumar, N.A., Suresh, C., and Rao, G.S., “Extended Kalman Filter for GPS Receiver
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52
Singapore, (2018).
53
ORIGINAL_ARTICLE
مدلسازی و کنترل تطبیقی دما و رطوبت یک موزه
در مقاله حاضر، به بررسی رفتار گرمایی، مدلسازی دینامیکی و کنترل متغیرهای یک موزه که یک ناحیة محصور محسوب میشود، پرداخته شده است. برای مدلسازی دینامیکی از روش انتقال حرارت یک بعدی برای المانهای ناحیه (روش2.3.1 DETECt) استفاده شده است. پس از مدلسازی دینامیکی، کنترل دما و رطوبت با روش تطبیقی مدل مرجع و بهبود یافته انجام شده است. نتایج عددی، شامل بررسی پاسخ سیستم بدون اعمال کنترلر و با اعمال آن، نمودار تعقیب مشخصه مطلوب توسط متغیرهای دینامیکی، نمودار خطا و تغییرات سیگنال کنترل و بهره های تطبیقی، مورد بحث قرار گرفته است.
https://jmep.isme.ir/article_46388_12f867491c30884e5f54d09ea3888d46.pdf
2020-11-21
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10.30506/ijmep.2020.101091.1509
مدلسازی موزه
کنترل تطبیقی
ناحیة محصور
رفتارگرمایی
بهنام
میری پور فرد
bmf@guilan.ac.ir
1
نویسنده مسئول، استادیار دانشکده مهندسی مکانیک، دانشگاه گیلان، رشت، ایران
LEAD_AUTHOR
امید
نادری
omidnaderi951@gmail.com
2
کارشناسی، دانشگاه صنعتی همدان، همدان، ایران
AUTHOR
[1] Van Schijndel, A.W.M., Schellen, H.L., Wijffelaars, J.L., and Van Zundert, K.,
1
“Application of an Integrated Indoor Climate: HVAC and Showcase Model for the Indoor
2
Climate Performance of a Museum”, Energy Build. Vol. 40, pp. 647-653, (2008).
3
[2] Kramer, R.P., Maas, M.P.E., Martens, M.H.J., Van Schijndel, A.W.M., and Schellen, H.L.,
4
“Energy Conservation in Museums using Different Set Point Strategies: A Case Study for
5
a State-of-the-art Museum using Building Simulations”, Appl. Energ, Vol. 158, pp. 446-
6
458, (2015).
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[3] Brimblecombe, P., and Ramer, B., “Museum Display Cases and the Exchange of Water
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Vapour”, Stud. Conserv, Vol. 28, pp. 179-188, (1983).
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[4] Buonomano, A., and Palombo, A., “Building Energy Performance Analysis by an In-house
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Developed Dynamic Simulation Code: An Investigation for Different Case Studies, Appl.
11
Energ, Vol. 113, pp. 788-807, (2014).
12
[5] Buonomano, A., Montanaro, U., Palombo, A., and Santini, S., “Temperature and Humidity
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Adaptive Control in Multi-enclosed Thermal Zones under Unexpected External
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Disturbances, Energy and Buildings, Vol. 135, pp. 263-285, (2017).
15
[6] Buonomano, A., De Luca, G., Montanaro, U., and Palombo, A., “Innovative Technologies
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for Nzebs: An Energy and Economic Analysis Tool and a Case Study of a Non-residential
17
Building for the Mediterranean Climate, Energy and Buildings, Vol. 121, pp. 318-343,
18
[7] Pedro, A., and Sala, A., “Multivariable Control Systems: An Engineering Approach”,
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Springer Verlag, London, (2004).
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[8] Brogliato, B., Lozano, R., Maschke, B., and Egeland, O., “Dissipative Systems Analysis and
21
Control: Theory and Applications”, Springer Verlag, London, (2007).
22
[9] Buonomano, A., Montanaro, U., Palombo, A., and Santini, S., “Dynamic Building Energy
23
Performance Analysis: A New Adaptive Control Strategy for Stringent Thermohygrometric
24
Indoor Air Requirements”, Appl. Energy. Vol. 163, pp. 361-386, (2016).
25
[10] ISO International Organization for Standardization ISO 6946:2008, Building Components
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and Building Elements Thermal Resistance and Thermal Transmittance Calculation
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Method, (2008).
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[11] Buonomano, A., “Code-To-Code Validation and Application of a Building Dynamic
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Simulation Tool for the Building Energy Performance Analysis”, Energies, Vol. 9, pp.
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301, (2016).
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[12] Bergman, T.L., Lavine, A.S., Incropera, F.P., and Dewitt, D.P., “Fundamentals of Heat
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and Mass Transfer”, 7th Ed. John Wiley & Sons, NJ, (2011).
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[13] Anderson, B.D.O., and Moore, J.B., “Linear Optimal Control”, Prentice Hall, Englewood
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Cliff, NJ, (1971).
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ORIGINAL_ARTICLE
محاسبه ضرایب شدت تنش در نیم صفحه ساخته شده از مواد ارتوتروپیک تابعی تضعیف شده توسط چندین ترک لبهای تحت بارگذاری ضربهای
با استفاده از روش توزیع نابجایی تحلیل تنش در نیم صفحهی ساخته شده از مواد ارتوتروپیک تابعی تضعیف شده توسط چندین ترک لبهای تحت بار خارج صفحهای ضربهای انجام شده است. ابتدا حل نابجایی با تشکیل معادله حاکم و اعمال شرایط مرزی و پیوستگی در محل نابجایی با استفاده از تبدیلات فوریه و لاپلاس انجام میگردد. با استفاده از این حل، معادلات انتگرالی تکین از نوع کوشی برای ترکهای لبهای در نیم صفحه ی ساخته شده از مواد ارتوتروپیک تابعی تشکیل میشوند. سپس با استفاده از روش عددی این معادلات حل گردیده تا تابع توزیع نابجایی روی ترکها بدست آید.
https://jmep.isme.ir/article_46419_d533149c4b748adfd94e139f71bcf9ab.pdf
2020-11-21
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10.30506/ijmep.2020.101220.1513
نابجایی ولترا
بارگذاری خارج صفحهای ضربهای
نیم صفحهی ساخته شده از مواد ارتوتروپیک تابعی
ضرایب شدت تنش دینامیکی
مجتبی
محمودی منفرد
mo_m_monfared@yahoo.com
1
نویسنده مسئول، استادیار، گروه مهندسی مکانیک، واحد هشتگرد، دانشگاه آزاد اسلامی، هشتگرد، ایران
LEAD_AUTHOR
رسول
باقری
r.bagheri@kiau.ac.ir
2
استادیار، گروه مهندسی مکانیک، واحد کرج، دانشگاه آزاد اسلامی، کرج، ایران
AUTHOR
[1] Maue, A.W., “Die Beugung Elastischer Wellen an Der Halbebene”. ZAMM‐Journal of
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Applied Mathematics and Mechanics/Zeitschrift für Angewandte Mathematik und
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Mechanik, Vol. 33, pp. 1-10, (1953).
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[2] Sih, G., “Some Elastodynamic Problems of Cracks”, International Journal of Fracture
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Mechanics, Vol. 4, pp. 51-68, (1968).
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[3] Itou, S., “Transient Response of a Finite Crack in a Half Plane under Impact Load”, Journal
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of Applied Mechanics, Vol. 48, pp. 534-538, (1981).
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[4] Ing, Y.S., and Ma C.C., “Transient Response of a Finite Crack Subjected to Dynamic Antiplane
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Loading”, International Journal of Fracture, Vol. 82, pp. 345-362, (1996).
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[5] Zhang, C., “Transient Elastodynamic Anti-plane Crack Analysis of Anisotropic Solids”,
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International Journal of Solids and Structures, Vol. 37, pp. 6107-6130, (2000).
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[6] Shul, C.W., and Lee, K.Y., “Dynamic Response of Subsurface Interface Crack in Multi-
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Layered Orthotropic Half-space under Anti-plane Shear Impact loading”, International
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Journal of Solids and Structures, Vol. 38, pp. 3563-3574, (2001).
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[7] Chen, J., Liu, Z., and Zou, Z., “Transient Internal Crack Problem for a Nonhomogeneous
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Orthotropic Strip (Mode I)”, International Journal of Engineering Science, Vol. 40, pp.
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1761-1774, (2002).
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[8] Noda, N., and Wang, B., “The Collinear Cracks in an Inhomogeneous Medium Subjected
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to Transient Load”, Acta Mechanica, Vol. 153, pp. 1-13, (2002).
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[9] Feng, W., Z., Zhang and Zou, Z., “Impact Failure Prediction of Mode III Crack in
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Orthotropic Functionally Graded Strip”, Theoretical and Applied Fracture Mechanics, Vol.
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40, pp. 97-104, (2003).
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[10] Itou, S., “Dynamic Stress Intensity Factors for Two Parallel Interface Cracks Between a
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Nonhomogeneous Bonding Layer and Two Dissimilar Elastic Half-planes Subject to an
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Impact Load”, International Journal of Solids and Structures, Vol. 47, pp. 2155-2163,
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[11] Hejazi, A., Ayatollahi, M., Bagheri, R., and Monfared, M.M., “Dislocation Technique to
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Obtain the Dynamic Stress Intensity Factors for Multiple Cracks in a Half-plane under
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impact Load”, Archive of Applied Mechanics, Vol. 84, pp. 95-107, (2014).
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[12] Ayatollahi, M., and Monfared, M.M., “Anti-plane Transient Analysis of Planes with
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Multiple Cracks”, Mechanics of Materials, Vol. 50, pp. 36-46, (2012).
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[13] Wu, K., and Chen, J., “Transient Analysis of Collinear Cracks under Anti-plane Dynamic
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Loading”, Procedia Engineering, Vol. 10, pp. 924-929, (2011).
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[14] Yousefi, P., Fariborz, J., and Fariborz, S.J., “Half-layers with Interface Cracks under Antiplane
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Impact”, Theoretical and Applied Fracture Mechanics, Vol. 85, pp. 367-374, (2016).
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[15] Cohen, A.M., “Numerical Methods for Laplace Transform Inversion”, Springer-Verlage
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US, (2007).
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[17] Baghestani, A.M., Fotuhi, A.R., and Fariborz., S.J., “Multiple Interacting Cracks in an
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ORIGINAL_ARTICLE
کنترل وقوع-تحریک مقاوم سیستم تعلیق فعال خودرو با درنظر گرفتن عدم قطعیت و قید های فیزیکی
در این مقاله به کنترل مقاوم فعال سیستم تعلیق نیم-خودرو با در نظرگرفتن عدم قطعیتهای پارامتری و مکانیزم وقوع-تحریک پرداخته شده است. در طراحی کنترلکننده، قیدهای فیزیکی حاکم بر سیستم نیز درنظر گرفته شده اند. در ابتدا با بیان معادلات دینامیکی سیستم تعلیق نیم-خودرو و ارائه مکانیزم وقوع-تحریک، مساله به همراه عدم قطعیتهای پارامتری فرمولبندی شده است. سپس با استفاده از قضیه لیاپانوف-کراسووسکی شرایطی در قالب نامساویهای ماتریسی خطی ارائه شدهاند که پایداری مقاوم و کارآیی سیستم تعلیق خودرو را تضمین میکنند. در انتها با بررسی یک سیستم تعلیق نمونه، کارآیی کنترلکننده های طراحی شده مورد مطالعه قرار گرفته است.
https://jmep.isme.ir/article_46393_1a5fca7e2d13bb4e022c04e3bdf39d5f.pdf
2020-11-21
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10.30506/ijmep.2020.103903.1539
سیستم تعلیق فعال خودرو
کنترل وقوع-تحریک
شاخص کارآیی ∞H
قضیه لیاپانوف-کراسووسکی
سید عرفان
رضوی زاده
erfankalmal@yahoo.com
1
دانشجوی کارشناسی ارشد، دانشکده مهندسی برق، دانشگاه تفرش، تفرش
AUTHOR
علی
کاظمی
kazemy@tafreshu.ac.ir
2
نویسنده مسئول، استادیار، دانشکده مهندسی برق، دانشگاه تفرش، تفرش
LEAD_AUTHOR
[1] Goodarzi, A., and Khajepour, A., "Vehicle Suspension System Technology and Design", Synthesis Lectures on Advances in Automotive Technology, Vol. 1, No. 1, pp. i-77, (2017).
1
[2] Asadi, E., Ribeiro, R., Khamesee, M. B., and Khajepour, A., "Analysis, Prototyping, and Experimental Characterization of an Adaptive Hybrid Electromagnetic Damper for Automotive Suspension Systems", IEEE Transactions on Vehicular Technology, Vol. 66, No. 5, pp. 3703-3713, (2016).
2
[3] Sun, W., Gao, H., and Shi, P., "Advanced Control for Vehicle Active Suspension Systems", Springer, (2020).
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[4] Pan, H., Sun, W., Jing, X., Gao, H., and Yao, J., "Adaptive Tracking Control for Active Suspension Systems with Non-ideal Actuators", Journal of Sound and Vibration, Vol. 399, pp. 2-20, (2017).
4
[5] Wang, G., Chen, C., and Yu, S., "Robust Non-fragile Finite-frequency H∞ Static Output-Feedback Control for Active Suspension Systems", Mechanical Systems and Signal Processing, Vol. 91, pp. 41-56, (2017).
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31
ORIGINAL_ARTICLE
تحلیل دینامیکی میکروتیر مدرج تابعی دارای جرم متحرک براساس تئوری زوج تنش اصلاح شده
در مقاله کنونی پاسخ دینامیکی میکروتیر مدرج تابعی تحت اثر میکروجرم متحرک بر اساس نظریه زوج تنش اصلاح شده در چارچوب مدل تیموشنکو برای شرایط مرزی مختلف ارائه شده است. معادلات حرکت و شرایط مرزی با استفاده از اصل همیلتون بدست آمدهاند، سپس روش پیشنهادی برای بدست آوردن فرکانسطبیعی و شکل مودهای ارتعاش متناسب با شرایط مرزی ارائه شده و مقادیر ویژه سیستم برای بدست آوردن پاسخ دینامیکی آن گسترش داده شدهاند. تأثیر پارامترهای مختلفی همچون مقیاس طول میکروتیر، نسبت ضخامت به طول ، شرایط مرزی، سرعت میکروجرم و اندیس توانی مورد بررسی قرار گرفت.
https://jmep.isme.ir/article_46392_0796468dce7c3effd45eec27d9159be9.pdf
2020-11-21
142
163
10.30506/ijmep.2020.104117.1540
زوج تنش
تیر مدرج تابعی
جرم متحرک
دینامیک
محمد
هاشمیان
hashemian@iaukhsh.ac.ir
1
نویسنده مسئول، استادیار، گروه مکانیک، واحد خمینیشهر، دانشگاه آزاد اسلامی، خمینیشهر، اصفهان
LEAD_AUTHOR
مصطفی
پیرمرادیان
pirmoradian@iaukhsh.ac.ir
2
استادیار، گروه مکانیک، واحد خمینیشهر، دانشگاه آزاد اسلامی، خمینیشهر، اصفهان، ایران
AUTHOR
محسن
نوذرپور شمی
nozarpoormohsen@gmail.com
3
کارشناسی ارشد، گروه مکانیک، واحد خمینیشهر، دانشگاه آزاد اسلامی، خمینیشهر، اصفهان، ایران
AUTHOR
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[15] اسماعیل زاده، سیدکمیل، ربیعی لاکمه سری، مهدی، و محمدپورنیک بین، ایمان، "تحلیل دینامیکی تیر تیموشنکو تحت اثر جرم متحرک با استفاده از روش بسط چند جمله ای های متعامد"، کنفرانس بین المللی مهندسی عمران، تهران، دبیرخانه دایمی کنفرانس، (۱۳۹۵).
16
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34
ORIGINAL_ARTICLE
تحلیل خمش غیرخطی پانلهای استوانه ای کامپوزیتی تقویت شده با نانوتیوب های کربنی هدفمند
در این مقاله رفتار غیرخطی خمشی پانل استوانهای تقویتشده با نانوتیوب های کربنی هدفمند تحت بار گسترده و تغییر درجه حرارت بررسی شدهاست. معادلات حاکم با استفاده از روش انرژی ریتز براساس روابط کرنش- تغییرمکان غیرخطی فون کارمن استخراج شدهاست. تاثیرات نحوه توزیع، میزان درصد حجمی، تغییرات درجه حرارت وهمچنین شرایط مرزی مختلف نانوتیوبها بر پارامترهایی از قبیل تغییرمکان عرضی و منتجه ممان خمشی مرکز پانل استوانهای مورد بررسی قرار گرفتهاست. میتوان نتیجه گرفت به ازای یک بارگذاری معین، پانل استوانهای تقویتشده با نانوتیوبهای کربنی با توزیع FG-X دارای بیشترین و با توزیع FG-Ʌ دارای کمترین منتجه ممان خمشی میباشد.
https://jmep.isme.ir/article_46842_d4aa3fa530bb9f852b02b515fd253225.pdf
2020-11-21
164
182
10.30506/ijmep.2020.104263.1542
پانل استوانهای
کامپوزیت تقویت شده
نانوتیوب های کربنی هدفمند
منتجه ممان خمشی
احسان
بزاز
ehsanbazzaz@yahoo.com
1
نویسنده مسئول، عضو هیئت علمی، دانشکده مهندسی مکانیک، دانشگاه آزاد اسلامی واحد تهران
LEAD_AUTHOR
ستار
جداری سلامی
sattar.salami@aut.ac.ir
2
استادیار، دانشگاه آزاد اسلامی واحد دماوند، دماوند
AUTHOR
مصطفی
سبزیکار بروجردی
mostafa.sabzikar@gmail.com
3
استادیار، دانشگاه آزاد اسلامی واحد فیروزکوه، فیروزکوه
AUTHOR
[1] Odegard, G.M., Gates, T.S., Nicholson, L.M., and wise, K.E., “Equivalent-continuum Modeling of Nano-structured Materials”, Composites Science and Technology, Vol. 62, pp. 1869-1880, (2002).
1
[2] Zhang, P., Huang, Y., Gao, H., and Hwang, K.C., “Fracture Nucleation in Single-wall Carbon Nanotubes under Tension: Continuum Analysis Incorporating Interatomic Potentials”, J. Appl. Mech, Vol. 69, pp. 454-458, (2002a).
2
[3] Zhang, P., Huang, Y., Geubelle, P.H., Klein, P., and Hwang, K.C., “The Elastic Modulus of Single-wall Carbon Nanotubes: Continuum Analysis Incorporating Interatomic Potentials”, Int. J. Solids Struct, Vol. 39, pp. 3893-3906, (2002b).
3
[4] Tserpes, K., and Papanikos, P., “Finite Element Modeling of Single-walled Carbon Nanotubes”, Composites: Part B, Vol. 36, pp. 468-477, (2005).
4
[5] Changa, T., and Gao, H., “Size-dependent Elastic Properties of a Single-walled Carbon Nanotube via a Molecular Mechanics Model”, Journal of the Mechanics and Physics of Solids, Vol. 51, pp. 1059-1074, (2003).
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[8] Shen, H., “Postbuckling of Nanotube-reinforced Composite Cylindrical Shells in Thermal Environments, Part II: Pressure-loaded Shells”, Composite Structures, Vol. 93, No. 10, pp. 2496-2503, (2011b).
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[9] Rafiee, M., Yang, J., and Kitipornchai, S., “Thermal Bifurcation Buckling of Piezoelectric Carbon Nanotube Reinforced Composite Beams”, Computers and Mathematics with Applications, Vol. 66, No. 7, pp. 1147-1160, (2013).
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[10] Pourasghar, A., and Kamarian, S., “Dynamic Stability Analysis of Functionally Graded Nanocomposite Non-uniform Column Reinforced by Carbon Nanotube”, Journal of Vibration and Control, Vol. 21, No. 13, pp. 2499-2508, (2015).
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[11] Lei, Z.X., Liew, K.M., and Yu, J.L., “Free Vibration Analysis of Functionally Graded Carbon Nanotube-reinforced Composite Plates using the Element-free kp-Ritz Method in Thermal Environment”, Composite Structures, Vol. 106, No. 1, pp. 128-138, (2013).
11
[12] Zhang, L., Lei, Z.X., Liew, K.M., and Yu, J.L., “Static and Dynamic of Carbon Nanotube Reinforced Functionally Graded Cylindrical Panels”, Composite Structures, Vol. 111, No. 1, pp. 205-212, (2014).
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[13] Zhang, L., Lei, Z.X., and Liew, K.M., “Free Vibration Analysis of Functionally Graded Carbon Nanotube-reinforced Composite Triangular Plates using the FSDT and Element-Free IMLS-Ritz Method”, Composite Structures, Vol. 120, No. 1, pp. 189-199, (2015a).
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[14] Zhang, L., Lei, Z.X., and Liew, K.M., “Vibration Characteristic of Moderately Thick Functionally Graded Carbon Nanotube Reinforced Composite Skew Plates”, Composite Structures, Vol. 122, No. 1, pp. 172-183, (2015b).
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[15] Salami, S.J., “Extended High Order Sandwich Panel Theory for Bending Analysis of Sandwich Beams with Carbon Nanotube Reinforced Face Sheets”, Physica E, Vol. 76, pp. 187-197, (2016a).
15
[16] Salami, S.J., “Dynamic Extended High Order Sandwich Panel Theory for Transient Response of Sandwich Beams with Carbon Nanotube Reinforced Face Sheets”, Aerospace Science and Technology, Vol. 56, pp. 56-69, (2018).
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[17] Salami, S.J., “Low Velocity Impact Response of Sandwich Beams with Soft Cores and Carbon Nanotube Reinforced Face Sheets Based on Extended High Order Sandwich Panel Theory”, Aerospace Science and Technology, Vol. 66, pp. 165-176, (2017).
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[18] Kiani, Y., “Thermal Post-buckling of Temperature Dependent Sandwich Plates with FG-CNTRC Face Sheets”, J. Thermal Stresses, Vol. 41, pp. 866-882, (2018).
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[19] Fu, T., Chen, Z., Yu, H., Wang, Z., and Liu, X., “Mechanical Behavior of Laminated Functionally Graded Carbon Nanotube Reinforced Composite Plates Resting on Elastic Foundations in Thermal Environments”, Journal of Composite Materials, Vol. 53, Issue. 9, pp. 1159-1179, (2018).
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[20] Brush, D., and Almorth, B., “Buckling of Bars, Plates and Shells”, McGraw Hill, New York, (1975).
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[21] Mirzaei, M., and Kiani, Y., “Free Vibration of Functionally Graded Carbon Nanotube Reinforced Composite Cylindrical Panels”, Composite Structures, Vol. 142, pp. 45-56., (2016).
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[22] Song, Y.S., and Youn, J.R., “Modeling of Effective Elastic Properties for Polymer Based Carbon Nanotube Composites”, Polymer, Vol. 47, pp. 1741-1748, (2006).
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[23] Shen, H., and Xiang, Y., “Nonlinear Bending of Nanotube-reinforced Composite Cylindrical Panels Resting on Elastic Foundations in Thermal Environments”, Engineering Structures, Vol. 80, pp. 163-172, (2014).
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[24] Mirzaei, M., and Kiani, Y., “Thermal Buckling of Temperature Dependent FG-CNT Reinforced Composite Conical Shells”, Aerospace Science and Technology, Vol. 47, pp. 42-53, (2015).
24
ORIGINAL_ARTICLE
تحلیل ضربه سرعت پایین بر ورقهای حلقوی تقویت شده با نانولولههای کربنی بهصورت هدفمند
در این پژوهش، تحلیل عددی ضربه سرعت پایین بر ورقهای حلقوی تقویت شده با نانولوله های کربنی بهصورت هدفمند با استفاده از روشهای المان محدود ارائه شده است. معادلات تعادل ورق بر اساس تئوری تغییر شکل برشی مرتبه اول ورق و اصل همیلتون استخراج شده است. برای شبیهسازی نیروی تماس بین ورق و ضربهزننده از قانون تماس هرتز استفاده شده است. همچنین با در نظر گرفتن، تغییر عوامل مختلف اعم از نحوه توزیع و درصد حجمی نانولوله ها در راستای ضخامت و جرم و سرعت ضربه زن به بررسی تأثیر این عوامل بر روی توزیع نیروی تماس و جابجاییها میپردازیم.
https://jmep.isme.ir/article_46540_ff26784d5cc3cbe17e0d6a0b0cbc7d84.pdf
2020-11-21
183
205
10.30506/ijmep.2020.105069.1552
ورق حلقوی
ضربه سرعت پایین
المان محدود
تئوری تغییر شکل برشی مرتبه اول
کامپوزیت تقویت شده با الیاف نانو
مسعود
بابایی
masoudbabaeiiiiii@yahoo.com
1
دانشجوی دکترا، مدرس مدعو، دانشکده فنی و مهندسی برق، مکانیک و کامپیوتر، دانشگاه ایوانکی، ایوانکی،
AUTHOR
کامران
عاصمی
k.asemi@iau-tnb.ac.ir
2
نویسنده مسئول، استادیار، دانشکده فنی مهندسی، گروه مهندسی مکانیک، دانشگاه آزاد واحد تهران شمال، تهران، ایران
LEAD_AUTHOR
نادر
نظری
nadernazariiiii@yahoo.com
3
کارشناسی ارشد، دانشکده فنی مهندسی، گروه مهندسی مکانیک، دانشگاه آزاد واحد تهران شمال، تهران
AUTHOR
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[2] Tooski, M., Yarmohammad, et al, "Experimental Investigation on Distance Effects in Repeated Low Velocity Impact on Fiber–metal Laminates", Composite Structures, Vol. 99, pp. 31-40, (2013).
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[4] Olsson, R., and McManus, H. L., "Improved Theory for Contact Indentation of Sandwich Panels", AIAA Journal, Vol. 34, No. 6, pp. 1238-1244, (1996).
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[5] Palazotto, A. N., Herup, E. J., and Gummadi, L. N. B., "Finite Element Analysis of Low-velocity Impact on Composite Sandwich Plates", Composite Structures, Vol. 42, No. 2, pp. 209-227, (2000).
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[6] Sburlati, R., "The Effect of a Slow Impact on Sandwich Plates", Journal of Composite Materials", Vol. 36, No. 2, pp. 1079-1092, (2002).
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[11] Shariyat, M., and Jafari, R., "Nonlinear Low-velocity Impact Response Analysis of a Radially Preloaded Two-directional-functionally Graded Circular Plate: A Refined Contact Stiffness Approach", Composites Part B: Engineering, Vol. 45, No. 1, pp. 981-994, (2013).
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[12] Shariyat, M., and Jafari, R., "A Micromechanical Approach for Semi-analytical Low-velocity Impact Analysis of a Bidirectional Functionally Graded Circular Plate Resting on an Elastic Foundation", Meccanica, Vol. 48, No. 9, pp. 2127-2148, (2013).
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ORIGINAL_ARTICLE
ارائهی یک سامانهی هوشمند تغییرخط اختیاری خودرو، در جریان ترافیک واقعی، مبتنی بر پارامتر زمان
در این مقاله یک سامانهی هوشمند برای رفتار تغییرخط اختیاری خودرو در جریان ترافیک واقعی، ارائه میشود. در مقدمه، تاریخچهیی از پژوهشهای انجام شده در رابطه با مدلهای ایجاد شده برای رفتار تغییرخط ارائه میشود. پس از ارائه ی روش جدید برای تعیین شروع و پایان رفتار تغییرخط، فرضیاتی برای استخراج دادههای تغییرخط اختیاری از دادههای ثبت شده توسط NGSIM معرفی و پس از آن یک سامانهی هوشمند با استفاده از دو زیر سیستم کنترلی مبتنی بر روش منطق فازی ارائه میشود. در نهایت نتایج حاصل از طراحی سامانهی هوشمند پیشنهاد شده، با رفتار راننده در حالت واقعی مقایسه میشود.
https://jmep.isme.ir/article_239614_7047a7597722b3f59703c13480b12cd9.pdf
2020-11-21
206
227
10.30506/ijmep.2020.105281.1556
تغییرخط
تغییرخط اختیاری
سامانهی هوشمند
منطق فازی
علیرضا
خدایاری
arkhodayari@yahoo.com
1
دانشیار، گروه مهندسی مکانیک، واحد پردیس، دانشگاه آزاد اسلامی، تهران، ایران
AUTHOR
علی
غفاری
ghaffari@kntu.ac.ir
2
نویسنده مسئول، استاد، گروه مهندسی مکانیک دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران
LEAD_AUTHOR
عباس
پورمحمودی
st_a_pourmahmoudi@azad.ac.ir
3
دانشجوی دکترا، گروه مهندسی مکانیک، واحد تهران جنوب، دانشگاه آزاد اسلامی، تهران، ایران
AUTHOR
مهرداد
جوادی
mjavadi@azad.ac.ir
4
دانشیار، گروه مهندسی مکانیک، واحد تهران جنوب، دانشگاه آزاد اسلامی، تهران، ایران
AUTHOR
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