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平动弹性梁的刚-柔耦合动力学
引用本文:蒋丽忠,洪嘉振.平动弹性梁的刚-柔耦合动力学[J].上海力学,2002,23(4):450-454.
作者姓名:蒋丽忠  洪嘉振
作者单位:[1]中南大学铁道校区土木建设工程学院,长沙410075 [2]上海交通大学工程力学系,上海200030
基金项目:国家自然科学基金重点资助(19832040),湖南省自然科学基金(00JJY2085),博士点基金(200024818)联合资助项目
摘    要:本文建立了作大范围平动弹性梁的刚-柔耦合动力学控制方程。分析了大范围平动对弹性梁变形运动动力学性质的影响,发现了大范围平动与变形运动之间的耦合动力学与大范围转动与变形运动之间的耦合动力学存在显著的差异。大范围平动使弹性梁的刚度降低,同时使系统阻尼增加;而大范围转动使弹性梁的刚度增加,同时使系统产生了能量转换的陀螺效应。因此,柔性多体系统刚-柔耦合动力建模中必须包括大范围平动与柔性体变形运动之间的耦合动力学效应。

关 键 词:弹性梁  大范围平动  刚-柔耦合动力学  负刚度  阻尼
修稿时间:2001年9月3日

Coupled Dynamics of Elastic Beams with Translation
Jiang Li-zhong,Hong Jia-zhen.Coupled Dynamics of Elastic Beams with Translation[J].Chinese Quarterly Mechanics,2002,23(4):450-454.
Authors:Jiang Li-zhong  Hong Jia-zhen
Abstract:The coupled dynamical equations of elastic beams with translation were established in this paper, and the dynamical effect of translation on the deformation of elastic beams was also analyzed. There exists notable difference between the coupled dynamics of translation and deformation and that of rotation and deformation. Translation decrease the stiffness of elastic beams and also increase the system's damp, While rotation increase the stiffness of elastic beams and also make the system produce gyp effect. Therefore, coupled effects between translation and deformation must be accounted in rigid-flexible coupled dynamical modeling of flexible multibody system.
Keywords:elastic beam  translations  rigid-flexible coupled dynamics  negative stiffness  damp
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