根据弹性薄板理论和振动理论，运用边界元法(BEM)分析了薄板弯曲自由振动的频率特性。

According to the elastic thin plate theory and vibration theory, a boundary element method (BEM) was used to analyze the frequency characteristics of a thin plate in lateral free vibration.

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介绍了接触电位差法固定探头式无损探伤装置的结构，工作原理，测量电路及其频率特性。

The structure, working principle, measuring circuit and frequency characteristics of contact potential difference nondestructive testing equipment using fixed probe am intro - duced.

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本文通过分析放大器瞬态特性和频率特性的关系，提出用瞬态测试法对放大器频率特性进行调试的方法。

In this paper, author analysis the relation between transient characteristic and frequency characteristic, and a method regulating frequency characteristic of amplifier is put for-wand.

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