The effect of the stiffness change of the slab track on the vertical dynamic characteristics of the system is analyzed.
在此基础上，分析了板式轨道的刚度变化对此系统竖向振动响应的影响规律。
It is shown that the stiffness change of the mortise-tenon joint is nonlinear from 0.3062 to 23.6054 with the change of load.
结果表明，木结构的榫卯连接刚度随荷载变化而呈非线性变化，刚度在0.3062 ~ 23.6054之间变化。
Stiffness change has little effect on the critical instability and motion of the cracked-rotor, and the system motion is quasi-period motion.
裂纹转子轴刚度变化对油膜失稳点及油膜失稳之后转子的运动影响不大，转子系统作拟周期运动。
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