对比分析不同激振情况下，踏面径向振动与辐板轴向振动对噪声声压级的贡献比例。
Compared of different contributions of the tread vibration and the web vibration on sound level of railway noise.
通过对6480型驱动桥的噪声功率、表面声强、表面声压、表面振动加速度以及相应的时频谱进行了全面、系统的测量和分析。
The noise power, sound intensity, sound pressure, vibration acceleration and corresponding time-frequency spectrum of 6480 driver axle surface were measured and analysed.
得出，当激振点不变时，激振力级的变化与振动模态辐射的平均声压级成线性关系；
When the exciting force was constant the average level of sound radiation produced by modal vibration has a linear relationship with the level of mode shapes.
研究压电泵振动放射噪声，提出两种由振动量计算压电泵合成声压的理论模型。
Contributes to a research on the vibration radiation noise of piezoelectric pump. Two theory models are introduced, which calculate the synthetic sound pressure according to the vibration quantity.
在已知内层壳体振动速度的情况下，计算出流场中距外层壳体一定距离处的声压级。
The sound pressure level at certain distance from the outer shell in flow field is obtained when the vibration velocity of the inner shell is known.
振动用加速度有效值描述，噪声以声压级表示。
The vibration is characterized by the virtual value of acceleration, and the noise is indicated by the sound-pressure-level.
对流场中一无限长周期环肋圆柱壳受激振动的辐射声压进行了理论和实验研究。
Sound radiation analysis of low order modes from the ring-stiffened cylindrical shells in fluid medium;
对流场中一无限长周期环肋圆柱壳受激振动的辐射声压进行了理论和实验研究。
Sound radiation analysis of low order modes from the ring-stiffened cylindrical shells in fluid medium;
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