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柔性板的刚-柔-热耦合动力学研究

发表时间:2013-08-15  浏览量:1144  下载量:306
全部作者: 潘科琪,刘锦阳
作者单位: 上海交通大学船舶海洋与建筑工程学院
摘 要: 提出柔性板的刚-柔-热三者耦合动力学建模方法。针对热载荷未知的工况,基于各向同性材料的热传导方程,考虑热流密度与刚体姿态运动、弹性变形和温度变化的相互耦合作用,首次建立了热流密度与刚体姿态坐标和弹性坐标的精确关系式。采用有限元法对温度和位移变形离散,以大范围运动变量、节点弹性变形和节点温度为广义坐标,考虑几何非线性,结合变分方程,引入约束方程,建立了多体系统刚-柔-热耦合动力学方程。通过仿真算例对动力学结果进行对比分析,解释了热振动现象。
关 键 词: 柔性多体力学;刚-柔-热耦合;热流密度;几何非线性
Title: Rigid-flexible-thermal coupling dynamics investigation of flexible plate
Author: PAN Keqi, LIU Jinyang
Organization: School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University
Abstract: Rigid-flexible-thermal coupling dynamic modeling method for flexible plate is proposed. For the cases of nonconstant thermal loading, based on the heat conductive variational equations of isotropic material, considering the coupling among the attitude motion, structural deformations and temperature change, the relationship among the heat flux density and the attitude motion coordinates as well as the elastic coordinates is firstly established. Finite element method is used for discretizing the temperature and deformation, the attitude motion coordinates, node elastic deformation and node temperature are adopted as generalized coordinates. Considering the geometric nonlinearity, combining variational equations and introducing the constraint function, rigid-flexible-thermal coupling dynamic equation is established. Dynamic performance is analyzed by mumerical simulation, which can be used for explanation of the thermally induced fluttering phenomena.
Key words: flexible multibody mechanics; rigid-flexible-thermal coupling; heat flux density; geometric nonlinearity
发表期数: 2013年8月第15期
引用格式: 潘科琪,刘锦阳. 柔性板的刚-柔-热耦合动力学研究[J]. 中国科技论文在线精品论文,2013,6(15):1457-1463.
 
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