中文摘要：

某 风洞实验室-层地面安装了 2 台空气压缩机,其工作时引起相邻的办公楼二层楼面振动激烈.对该 振动情况进行了现场振动测试,发现振动卓越频率呈倍频形式出现,与空压机的额定转速相对应,其余倍频由 3 个相互成60°夹角的活塞运动引起.二层楼面的竖向振动幅值大于水平向振动,因此减振应以竖向减振为 主.设计安装了 8 0块矩形隔振垫,隔振后结构二层楼面竖向振动衰减为隔振前的1 /1 0左右,达到了预期减振 目标.

英文摘要：

When the two air compressors installed on the ground floor of a wind tunnel labo-ratory are working, the 2nd floor of the neighbouring building vibrates severely. Field vibra-tion testing finds that the predominant frequencies appear as multiplication. The fundamen-tal frequency is corresponding to the revolving speed and the other predominant frequencies are caused by the motion of three pistons. The amplitude of vertical vibration is larger than that of the horizontal vibration in the 2nd floor, so the vibration absorbing will be paid more attention to. When 80 isolation cushions are designed and installed the amplitude of vertical vibration is only 1/10 of the before,and the desired vibration control expect is achieved.