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آنالیز ارتعاش ساندویچ پنل با رویکرد شبیهسازی همگن با تجزیه و تحلیل مودال | ||
| مدل سازی در مهندسی | ||
| دوره 22، شماره 78، آبان 1403، صفحه 17-30 اصل مقاله (1.11 M) | ||
| نوع مقاله: مقاله مکانیک | ||
| شناسه دیجیتال (DOI): 10.22075/jme.2024.33202.2616 | ||
| نویسندگان | ||
| امیر رضا موسوی1؛ امیرحسین کاظمیان* 2 | ||
| 1دانشجوی کارشناسی ارشد مهندسی مکانیک ، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران | ||
| 2استادیار، گروه مهندسی مکانیک، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان، ایران | ||
| چکیده | ||
| سازه های ساندویچپنل با هستههای متنوع چه از نظر هندسی و چه از نظر نوع و جنس صفحات، امروزه در صنعت بسیار پرکاربرد، مفید و نیز دارای پتانسیل به جهت ارتقا هستند. در پژوهش حاضر سازه ساندویچپنل با صفحات آلومینیومی و هسته از جنس اسیدپلیلاکتیک و نیز با هندسه کاروگیت از نوع لانهزنبوری، ساخته شده است و عینا در نرمافزار کتیا طراحی و شبیهسازی شده و سپس در نرمافزار آباکوس مورد بررسی ارتعاشاتی قرار گرفته است. شبیهسازی در دو حالت شبیهسازی کاملا مشابه و در حالت همگنسازی شده صورت گرفته است. در حالت همگنسازی، هسته لانهزنبوری که از جنس اسیدپلیلاکتیک است و دارای خاصیت ایزوتروپیک میباشد، به یک صفحه مسطح با خواص ارتوتروپیک معادلسازی شده است. به جهت اعتبارسنجی شبیهسازی نرمافزاری، آزمایش تجربی مودال نیز بر روی نمونه انجام شده، و نیز نتایج آزمون مودال در نرمافزار N-modal تحلیل شده و نتایج تحلیلی با نتایج آزمون مودال مقایسه شدهاند. همچنین نتایج شبیهسازی دارای اتصالات چسبی بدون لحاظکردن اتصالات چسبی با یکدیگر مقایسه شدهاند که نشان میدهد اتصالات چسبی تاثیر چندانی بر شکل مودها و فرکانس ارتعاشات ازاد (کمتر از 1/1 درصد) نمیگذارند. نتایج شبیهسازی و نیز آنالیز مودال حاکی از ضریب خطای کمتر از %7 میباشد. میتوان از تکنیک همگنسازی ارائهشده برای هموارتر کردن مسیر شبیهسازی، کاهش زمان لازم و نیز پیچیدگی مسائل استفاده کرد. | ||
| کلیدواژه‌ها | ||
| پنل ساندویچی؛ هندسه لانهزنبوری؛ ساختار کاروگیت؛ آنالیز‌مودال؛ روش اجزا محدود؛ فرکانس‌طبیعی | ||
| عنوان مقاله [English] | ||
| Vibration Analysis of Sandwich Panel Structures: A Homogenized Simulation Approach with Modal Analysis | ||
| نویسندگان [English] | ||
| Amir Reza Mousavi1؛ Amir Hossein Kazemian2 | ||
| 1Master Student of Mechanical Engineer, University of Sistan And Baluchestan, Zahedan, Iran | ||
| 2Assistant professor, Faculty Member of Mechanical Engineering, University of Sistan And Baluchestan, Zahedan, Iran | ||
| چکیده [English] | ||
| Sandwich panels with diverse core materials and different types and materials are extensively employed in the industry and hold significant potential for improvement. This study focuses on a specific sandwich panel configuration consisting of aluminum face sheets and a polylactic acid (PLA) core with a honeycomb corrugated geometry. The design of this panel was accomplished and its behavior was simulated using CATIA software. The vibration characteristics of the panel were subsequently analyzed utilizing Abaqus software. Two simulation modes were employed: a fully identical simulation and a homogenized simulation. In the homogenized simulation, the honeycomb core composed of PLA with isotropic properties was replaced by an equivalently represented flat plate possessing orthotropic properties. To validate the accuracy of the software simulation, experimental modal testing was conducted on a physical sample. The obtained modal test results were subjected to analysis using N-modal analysis software and then compared with the analytical simulation results. Furthermore, the simulation results were compared with and without considering the adhesive connections, revealing minimal influence of the adhesive connections (less than 1.1%) on mode shapes and natural frequencies. The simulation results and modal analysis indicate an error coefficient of less than 7%. The presented homogenization technique can be effectively employed to streamline the simulation process, reduce time requirements, and simplify the complexity of the investigated issues. . | ||
| کلیدواژه‌ها [English] | ||
| Sandwich panel, Honeycomb structure, Corrugation structure, Modal analysis, Finite elements method, Natural frequency | ||
| مراجع | ||
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