基于小波变换的缓冲平台隔振性能分析

Vibration Isolation Performance Analysis of Buffer Platform Based on Wavelet Transform

根据水下爆炸作用下设备冲击响应的分析原理,分析了一组实验测量数据,并对数据进行了一维离散小波分析,提取了信号的细部特征,最后计算了各频带的能量百分比和缓冲平台的吸收系数。实验结果表明:缓冲平台主要吸收20 Hz以上的高频振动能量,吸收系数在0.99以上,该设计结构能有效减缓振动冲击;低于20 Hz的低频振动能量60%以上都传递给设备,但小幅度的低频振动不会造成设备损坏,从而确保了设备在严酷的冲击环境下正常工作。

According to the analysis theory of equipment impulse response resulting from underwater explosion, one-dimensional discrete wavelet analysis is implemented and detail characteristics of the signals are extracted based on a set of metrical data. Finally, the energy percentage of each frequency band and the absorption coefficient of buffer platform are calculated. The experiment resuhs indicate that： the buffer platform mainly absorb the high frequency shock energy above 20Hz, the absorption coefficient is above 0.99 and its design structure can slow up shock impact in effect; more than 60% of low frequency shock energy under 20Hz which can not damage the equipment is transmitted to the equipment, ensuring that the equipment can work normally under an atrocious condition.