The first method was loaded tooth contact analysis(LTCA), the second method was to solve nonlinear dynamics equation and the third method is to integrate torsional vibration model with LTCA.

论述了螺旋锥齿轮动力学研究的三种主要方法，即加载接触分析（LTCA）、解多维非线性方程组的方法，以及加载接触分析与周向振动模型结合的仿真分析方法。

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The frequency spectral analyses show that the second ignition method could weaken and restrain the high frequency vibration, improve the characteristic of vibration in high loading density charge.

压力波的频谱分析表明在高装填密度装药中，采用第二种点传火方案能削弱和抑制压力波的高频振荡成分，改善其振动特性。

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The finite element method is used to analyse the natural vibration of a exhaust chimney with steel structure in a nuclear power plant, such as the first, the second frequency and their model.

利用有限元法分析了某核电站排气钢塔的固有振动特性，即一阶、二阶振动频率及振型。

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