【摘要】 研究了一条长50m、宽2m、深7m隔振沟的减震效应。振动时,利用测振仪对隔振沟两侧振动速度时程进行了纪录,对两侧的振动速度峰值及其振动速度时程的频谱特性进行了分析,结果表明:隔振沟对水平径向振动的速度峰值幅值隔振效果显著,达到了80%,而对垂直向振动的速度峰值幅值隔振效果不到30%;同时隔振沟还改变了振动速度波的频谱特性,隔振沟不仅改变了水平径向振动的频谱形状,而且使其最大峰值频率有一定程度的降低,而对垂直向振动的频谱形状及其最大峰值频率则均无明显的改变。更多还原

【Abstract】 The vibration-isolating effect of a vibration-isolating slot which is 50 m in length,2 m in width,7 m in depth are studied.Based on the recorders of time histories on ground surface velocities of two sides of vibration-isolating slot,peak particle velcities and the frequency spectrum characteristics of vibration velocity wave are analyzed.The results show that the vibration-isolating effect on horizontal velocity amplitude is obvious,with about 80%,but the damping effect on vertical velocity amplitude is less than 30%.The vibration-isolating slot also changes the frequency spectrum characteristics of velocity wave.For horizontal velocity wave,the shape of frequency spectrum is changed,and the peak frequency amplitude is decreased,while there is no obvious changes in these aspects for vertical wave.更多还原