The process of determining modal parameters from experimental data involves several phases.

从试验数据确定模态参数的过程分成几个阶段。

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But this time measurements and modal data are only collected for the interior surface of the structure.

但这次只采集结构内部平面的测量结果和模态数据。

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It's one that comes up often in terms of estimating modal parameters from test data.

这是个很好的问题，是一个从试验数据中估计模态参数常常会遇见的问题。

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