Field Test on the Isolation Effects of Duxseal-WIB Subjected to Vertical Excitation Forces

摘要

This study proposes a new vibration isolation technology for perforated wave-impeding blocks (conventional WIBs) filled with Duxseal (DXWIB). A series of field tests were performed on conventional WIB, porous WIB, and DXWIB under different distances and frequencies. Accordingly, we discuss (a) the influence of distance and frequency on the vibration isolation performance of these three methods and (b) the vibration isolation efficiency of these three methods. The test results showed that compared with conventional WIB and porous WIB, the vibration isolation of DXWIB was more efficient. For acceleration, the average vibration screening effects of DXWIB were improved by 53.0 %, 54.3 %, and 69.6 % in the X-, Y-, and Z directions, respectively. As for displacement, the average vibration screening effects were improved by 56.8 %, 52.5 %, and 65.8 %. Moreover, DXWIB greatly increase the frequency bandwidth of vibration reduction, and has an excellent vibration isolation performance at frequencies of 5-70 Hz, which improves the defects of conventional WIB due to its design mechanism. The study creatively combines the wave-impeding block with the vibration absorbing material Duxseal for vibration isolation, which greatly improves the efficiency of vibration isolation and enriches the methods used for vibration isolation.