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Nonlinear response analysis and experimental verification for thin-walled plates to thermal-acoustic loads

Nonlinear response analysis and experimental verification for thin-walled plates to thermal-acoustic loads
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摘要 为大偏转,到为夹钳的金属性的薄墙的板的热声学的负担,热声学的刺激测试和相应模拟分析的薄墙的结构的强烈非线性的反应问题被实现了。把计算价值与试验性的价值作比较显示出一致性并且为受到热声学的负担的薄墙的板验证计算方法和模型的有效性。然后,这份报纸进一步在不同热声学的负担联合下面为生气加强板完成动态反应计算。基于获得的时间域排水量反应,关于结构颤动形式的分析主要集中于 buckled 以后板的三个典型运动,显示在热负担之间的力量和声学的负担决定的亲戚跳板形成。排水量反应的概率光谱密度功能(PDF ) 被采用画并且分析统计分析方法,和它清楚地证明 buckled 以后板的 PDF 展出 bimodal 现象。然后力量光谱密度(PSD ) 功能被用来随温度的增加分析反应频率和相应山峰的变化,以及板的弄软并且变硬的区域怎么是坚定的。在最后节,这份报纸在弄弯区域的 pre/post 讨论张力的应力和压缩应力的变化法律,并且为压力根吝啬的平方(RMS ) 的 N 字形趋势给原因。 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 thermalacoustic 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 postbuckled 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).
作者 Yundong SHA Jian WANG Yundong SHA;Jian WANG
出处 《中国航空学报:英文版》 SCIE EI CAS CSCD 2017年第6期1919-1930,共12页 Chinese Journal of Aeronautics
基金 supported by Aviation Basic Science Fund Project of China (No. 20151554002)
关键词 弄弯 试验性的确认 非线性的反应 力量光谱密度 概率光谱密度 猛咬彻底地 热声学的负担 薄墙的结构 Buckling Experimental verification Nonlinear response Power spectral density Probability spectrum densitySnap-through Thermal-acoustic load Thin-walled structure
作者简介 Corresponding author. E-mail address: j_wang2001 @sina.com
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