模态分析用于确定设计中的结构及其部件的振动特性，包括结构的固有频率和振型。
Modal analysis is used to determine the vibration characteristic of a structure and its components, including the natural frequencies and vibration modes of the structure.
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.
空气弹簧具有变刚度特性，其振动频率要比钢板弹簧低得多。
Air springs have characteristics of variable stiffness, and their natural frequency are much lower than leaf springs.
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