采用伪速度冲击响应谱评估蜂窝夹层板破坏边界

This paper adopts the pseudo velocity shock response spectrum (PVSRS) to evaluate the damage boundary of spacecraft honeycomb sandwich structure. The shock response spectrum (SRS) commonly used in the aerospace field is the absolute-acceleration SRS (AASRS). Compared with the AASRS, the PVSRS more clearly shows the structure response under the shock load in low frequency, intermediate frequency and high frequency respectively. The effects of elastic force and inertial force on structural safety in low frequency, intermediate frequency and high frequency are analyzed. Based on the above discussions, the structure damage boundary is given in the logarithmic four-coordinate pseudo-velocity spectrum. The damage boundaries of a typical honeycomb sandwich structure are calculated by the finite element method and by the presented PVSRS method respectively, showing that these two boundaries agree well. The presented damage boundary analysis method based on PVSRS is a useful supplement to the commonly used AASRS method.