多体系统齐次矩阵方法在浮桥运动响应中的应用研究  

Study on the application of the homogeneous matrix method of the multi-body system to the dynamic response of floating bridge

作　　者：江召兵[1] 沈庆[1] 陈徐均[1] 赵红亮[1] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007

出　　处：《计算力学学报》2010年第6期1036-1041,共6页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(JHJ50779072;JHJ51009147)资助项目

摘　　要：浮桥的抗弯刚度和受弯变形位移波的传播速度都比一般钢桥或混凝土桥小得多。在快速移动重载作用下,荷载移动速度有可能接近甚至超过浮桥位移波的传播速度,这样就会造成移动荷载前方浮桥位移波的堆积效应。介绍了多体系统齐次矩阵方法,并用齐次矩阵方法对浮桥进行建模和求解,通过数值模拟和已有的模型试验表明:当荷载的移动速度较大时,浮桥多体系统的运动呈现明显的波动现象,速度越大位移波的堆积越明显。The stiffness of the long floating bridge and the propagation velocity of displacement wave are much less than those of the general steel or concrete bridge. The effect of the displacement wave accumulation will be arisen in front of load on the floating bridge subjected to fast and heavy load when the velocity of the load is faster than that of the propagation of displacement wave. Then the homogeneous matrix method for multi-body is briefly introduced firstly, and the dynamic function for the floating bridge is written by employing the homogeneous matrix method. Then the numerical and the model test both indicated that the wave accumulation effect is more obvious when the load is heavier and the velocity of the load is faster.

关 键 词：齐次矩阵方法 位移波堆积 浮桥 快速重载 

分 类 号：O353[理学—流体力学]