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浮桥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。文中简要介绍了多体系统齐次矩阵方法,包括6个4×4阶动力学和运动学矩阵和它们之间的关系,并基于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都表明: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。
Under fast moving heavy loads, the load moving speed of the pontoon may approach or even exceed the propagation speed of the floating wave of the floating bridge, which will cause the stacking effect of the floating wave in front of the moving load. In this paper, a brief introduction of multi-body system homogeneous matrix method, including 6 4 × 4 order kinematics and kinematics matrix and the relationship between them, and based on the homogeneous matrix method to model and solve the floating bridge. Numerical simulation and existing model tests show that when the moving speed of the load is large, the movement of the pontoon multi-body system shows obvious fluctuations. The more the displacement is, the more obvious the accumulation of the displacement wave.