摘要
对气浮台和大变形薄板多体系统动力学建模理论和实验方法进行研究。基于非线性应变和位移关系,从曲率的精确表达式出发,用绝对节点坐标法建立了大变形矩形薄板的动力学变分方程。考虑结构阻尼,建立了气浮台和大变形薄板多体系统的动力学方程。利用非接触式的运动测量仪测量特征点的速度和气浮台的角速度,利用应变仪测量特征点的应变,通过理论和实验结果的数值对比验证了几何非线性动力学模型的正确性。
Here, dynamic modeling and tests for a hub-plate multi-body system were investigated. Based on nonlinear strain-displacement relationship and exact curvature expression, dynamic variational equations for a rectangular plate with large deformation were established using the absolute nodal coordinate formulation. Considering structural damping, the rigid-flexible coupled dynamic equations for the hub-plate multi-body system were derived. By using a non- contact motion measuring instrument, the velocities of the plate points and the angular velocity of the hub were measured. In addition, by using a strain measuring instrument, the strains of the plate points were measured. Comparison of the simulation and test results verified the correctness of the proposed geometric nonlinear dynamic model.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第21期11-14,21,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(10872126)
教育部博士点基金(20100073110007)
关键词
大变形
刚-柔耦合动力学
几何非线性
实验
large deformation
rigid-flexible coupled dynamics
geometric nonlinearity
test
