振动试验设备上楼的振动分析与隔振

Vibration Isolation Design for Equipment on the Floor

振动设备安装在楼板上,其振动的影响要远大于在地面上。因此,在结构设计中,不仅要满足静力设计的条件,还需要进行动力分析。为了减少振动危害,就需采取有效的隔振方法。对于激振频率较高的振动设备,采用在试验台下设配重底板隔振的方法可以提高隔振效率。振型叠加法是振动理论中较常用的一种分析方法,对于有明确激振作用的情况,运用RITZ法结合数字分析技术可以得到较好模拟精度。结合工程,可选用多组隔振参数,运用有限元分析方法,就可以对隔振系统进行优化设计。针对某试验室改造项目,试验室二楼上装有一台电磁振动台,采取适当增加楼板刚度,增加楼板质量,并采取隔振处理,取得了很好的效果。理论分析结果令人满意。

The influence of vibration equipment installed in the floor is much larger than the vibration on the ground.Therefore,the structural design should not only meet the conditions of static design,but also the need for dynamic analysis.In order to reduce vibration hazards some necessary isolation measures should be considered while designing.For the higher excitation frequency vibration equipment,adding the suitable weight can improve floor vibration isolation efficiency.Vibration mode superposition method is more commonly used in a theoretical analysis,the role for a clear case of excitation using the RITZ method combined with digital analysis techniques can get a better simulation accuracy.Considering the project,multiple vibration parameters can be selected,and the finite element method to the isolation can be used to optimize the design of vibration isolation.