Processing the response signals by using the random decrement technique, a unique corresponding to each mode is obtained, which represents a free vibration response of the structure.
应用随机减量技术对响应信息进行处理，相应于结构的每一振型可得到一条独特的随机衰减曲线，该曲线代表结构自由振动响应。
The decrement of higher modal response of the rotor system is lost when damper mass-factor exceeds a limiting range.
当质量参数超出某有效区间时，系统将失去对高阶模态响应的衰减作用。
The theory of free response from random decrement technique and model parameter identification are researched; wheel sets of locomotive and vehicle are the research object of this paper.
叙述了运用随机减量法获取自由响应的基本原理以及模态参数的提取方法。
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