涂层悬臂梁非线性动力学分析
Nonlinear Dynamics of Coating Cantilever beam
热障涂层具有抗高温、耐磨损以及抗腐蚀氧化能力,同时也是一种表面约束阻尼层,能够有效避免强度、刚度损失,达到抑制结构振动和噪音的目的,因此热障涂层在航空发动机和燃气轮机热端部件特别是叶片中广泛应用。本文把热障涂层叶片简化为层合悬臂梁力学模型,利用层合梁理论建立非线性动力学方程,通过Galerkin离散和多尺度摄动分析得到系统平均方程,最后数值分析分析外激励对叶片非线性动力学特性的影响,发现系统存在周期运动和混沌运动。
eramic thermal barrier coatings (TBCs) have been developed for advanced gas turbine and diesel engine applications to improve engine reliability and fuel efficiency. Because of their low thermal conductivity, thermal barrier coatings can provide better heat insulation for the engine system, thus allowing higher operating temperatures and reduced cooling requirements for future advanced engines. In this paper, the TBCs blade is simplified as laminated cantilever beam. And the Hamilton principle is used to build the nonlinear dynamic equation based on the laminated beam theory. The averaged equation is obtained by using the Galerkin method and the method of multi-scale. Lastly, the nonlinear vibration characteristics are analyzed through numerical simulation, and periodic and chaotic motions were found.
张伟、陈宝、曹东兴
航空航天热力工程、热机工程基础科学材料科学
层合梁叶片悬臂梁混沌
laminated beambladecantilever beamchaos
张伟,陈宝,曹东兴.涂层悬臂梁非线性动力学分析[EB/OL].(2013-10-30)[2025-08-23].http://www.paper.edu.cn/releasepaper/content/201310-415.点此复制
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