采用等时隙采样方法，频率随机波动的大小则会严重影响谱分析的结果。
For uniform time sampling, the level of frequency fluctuation will greatly influence the results of spectrum analysis.
根据波动理论，满足随机响应工程计算精度要求的有限元网格大小与待求高频随机响应问题的频率范围上限有关。
According to wave motion theory, finite element mesh size satisfying the needs of engineering calculating precision is relevant to the upper limit of frequency range of random (response) problems.
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