Dynamic characteristics of collaborated system mainly include natural vibration frequency and principal mode, which is the base and precondition of dynamic analysis for collaborated system.
协作体系的动力特性主要包括体系的自振频率和主振型，它是协作体系结构动力分析的基础和前提。
Use two freedom vibration theory, base on impact has instant motion characteristic, use puncher example, study the isolating vibration design of impact base.
应用两自由度振动理论，根据冲击具有瞬态运动的特点，以冲床为例，研究冲击基础的隔振设计。
In this paper the dynamic influence depth and the soil mass of participating in vertical vibration are researched for inhomogeneous base soils under machine foundations.
对设置在不均质地基上的机器基础的动力影响深度问题以及地基土的参振质量问题进行了初步的研究。
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