分析了国内外在列车-轨道（桥梁）时变系统空间振动方程的建立及其求解过程中存在的根本问题。
The fundamental problem in the establishment and solution to the spatial vibration equation of train-track (bridge) time-varying system at home and abroad is analyzed in detail.
用积分变换和积分方程研究多孔饱和半空间上刚性圆板的垂直振动问题。
The vertical vibration of a rigld circular plate on a poroelastic half space is studied by using the technique of integral transform and integral equation.
最后自动组成空间刚体自由振动微分方程的系数阵，并计算出刚体的自振频率和振型。
Therefore, the differential equations 'coefficient matrix of the free vibration of the spatial rigid body is automatically formed, and free vibration frequency and its type can also be found out.
应用推荐