【摘要】 对爆破振动信号进行时频分析是为了更全面而准确地得到信号能量随时间、频率的分布状况。RSPWVD二次型时频分析虽然具有较高的积聚性,对产生的交叉项也有较好的抑制,但不可避免会损失部分信号,无法获得爆破振动信号的细节信息。利用RSPWVD二次型时频分析与小波分析相结合的分析方法对实测的爆破振动信号进行时频分析,结果表明:此种方法提高了爆破振动信号时频特征的精度,展现了爆破振动信号的时频细节信息,可获得更加直观、合理、时频分辨率更高的信号时频特征。更多还原

【Abstract】 The objective of time-frequency analysis of a blasting vibration signal is to obtain distributions of the signal energy versus time and frequency comprehensively and accurately.RSPWVD quadratic time-frequency analysis method has higher accumulation and can suppress the cross terms preferably,but part of signal information will be lost in analysis process and it is inevitable that details of blasting vibration signal information can’t be obtained.Here,RSPWVD quadratic time-frequency analysis method and the wavelet analysis method were combined to analyze a blasting vibration signal,the results showed that the proposed method can increase the precision of the time-frequency characteristics of the blasting vibration signal,reveal its detailed information,and gain its more intuitive,more reasonable and higher resolution time-frequency characteristics.更多还原