The earthquake free-field input technique is also implemented in this model.

该模型采用自由场方式输入地震。

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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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