کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7153865 1462492 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear response analysis and experimental verification for thin-walled plates to thermal-acoustic loads
ترجمه فارسی عنوان
تجزیه و تحلیل پاسخ غیر خطی و تایید آزمایشگاهی برای صفحات نازک دیواره به بارهای حرارتی آکوستیک
کلمات کلیدی
خم شدن تأیید تجربی، پاسخ غیرخطی تراکم طیفی قدرت چگالی طیف احتمالی، ضربه محکم و ناگهانی بار حرارتی آکوستیک، ساختار نازک-دیواره،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
For large deflection strongly nonlinear response problem of thin-walled structure to thermal-acoustic load, thermal-acoustic excitation test and corresponding simulation analysis for clamped metallic thin-walled plate have been implemented. Comparing calculated values with experimental values shows the consistency and verifies the effectiveness of calculation method and model for thin-walled plate subjected to thermal-acoustic load. Then this paper further completes dynamic response calculation for the cross reinforcement plate under different thermal-acoustic load combinations. Based on the obtained time-domain displacement response, analyses about structure vibration forms are mainly focused on three typical motions of post-buckled plate, indicating that the relative strength between thermal load and acoustic load determines jump forms of plate. The Probability spectrum Density Functions (PDF) of displacement response were drawn and analyzed by employing statistical analysis method, and it clearly shows that the PDF of post-buckled plate exhibits bimodal phenomena. Then the Power Spectral Density (PSD) functions were used to analyze variations of response frequencies and corresponding peaks with the increase of temperatures, as well as how softening and hardening areas of the plate are determined. In the last section, this paper discusses the change laws of tensile stress and compressive stress in pre/post buckling areas, and gives the reasons for N glyph trend of the stress Root Mean Square (RMS).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Aeronautics - Volume 30, Issue 6, December 2017, Pages 1919-1930
نویسندگان
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