结构动态载荷识别的精细逐步积分法  

High precision direct integration scheme for structural dynamic load identification

作　　者：徐倩[1] 文祥荣[1] 孙守光[1] 

机构地区：[1]北方交通大学机电工程学院机车车辆研究所,北京100044

出　　处：《计算力学学报》2002年第1期53-57,共5页Chinese Journal of Computational Mechanics

基　　金：中国铁道部部级项目资助

摘　　要：对比例阻尼系统给出了基于精细逐步积分法的动态载荷识别方法。首先将系统进行模态坐标变换得到无耦合运动方程 ,然后应用精细逐步积分法构造一种高效精确的载荷识别公式 ,再由量测到的结构动态响应求出动态力的时间历程。A dynamic load identification method is proposed for proportional damping systems based on high precision direct integration scheme. First, the modal transformation is carried out to obtain the uncoupled equations of motion. Then, an equation of load identification is constructed by the proposed high precision direct scheme. Finally, the time history of the dynamic loads can be determined by the measured structural dynamic response. Numerical examples show the high identification precision of the present method.

关 键 词：模态分析 动态载荷识别 逐步积分法 无耦合运动方程 结构动态响应 仿真计算结果 

分 类 号：O342[理学—固体力学] U260.17[理学—力学]