principal vibration frequency 主振频率
principal vibration spring 主振弹簧
principal vibration direction 释义主变更方向
principal mode of vibration 主振动形式
principal and additional vibration frequency 附振频率 ; 主振频率
The principal vibration of a simple beam with elastic supports was analyzed and the analytical formulation of normal vibration mode was derived.
给出了弹性支承桥梁和车体的振动方程并通过对具有弹性支座简支梁主振动的分析，得出了梁主振型的解析公式。
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。
Then for the vibration system with time-varied parameters and without time-varied elements in restoring force, a principal to design a derived synchronization system is given and proved.
然后，对于含有时变系统参数，非线性力不含时间项的情况进行了研究，给出了与其同步的系统的设计方法。
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