缺省的分析过程不包括预应力，即结构是Modal Extraction Method (模态提取方法) 处于无应力状态。如果要在分析中包含预应力的影响，则必须有先前在静力学或瞬态分析中生成的单元文件。
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提出一种基于经验模态分解（EMD）的水轮发电机组局部放电信号提取方法。
This paper investigates a new method of extracting partial discharge signals of hydroelectric generating set based on empirical mode decomposition (EMD).
针对传统滤波方法处理非平稳信号的不足，提出利用经验模态分解法来处理转子启动信号，通过此方法的自适应滤波特性来提取这类信号中的低频分量。
This paper describes a method to extract the low frequency component from rotor startup signal based on empirical mode decomposition, which overcomes the difficulties of traditional filter methods.
提出了一种基于模态频率的声信号频域特征信息提取方法，并将该方法用于堆垛机结构的冲击载荷分类识别研究。
A new approach is presented for feature extraction from sound signals generated by the structure sound radiation in frequency domain using modal frequency.
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