动力设备作用下某医院楼盖振动控制研究

Research on vibration control of a hospital power station floor under the action of power equipment

以某医院动力站房上部楼盖振动危害问题为工程背景,开展了动力设备作用下楼盖振动控制研究。首先通过现场动力测试获取振源特性及各层楼盖动力响应,分析动力站房上部楼盖振害产生原因及其传递规律,然后结合建立的局部有限元模型确定楼盖振动关键传递路径,最后提出相应振动控制措施。结果表明:动力站房上部结构楼盖的竖向振动主要由动力设备引起,管道与上层楼盖固结及管道穿墙是导致振动传递至上部楼盖的主要原因;由管道支架直接传递至上层楼盖为影响最大的振动传递路径;安装管道减振支架可降低上层楼盖79%以上的竖向振动加速度响应,满足振动舒适度要求。

Based on the vibration hazard problem of a hospital power station floor,the vibration control of the power station floor is carried out.Firstly,the characteristics of vibration source and the dynamic response of each floor are obtained by field dynamic test,and the causes and transmission rules of floor vibration damage are analyzed.Then,the key transmission path of floor vibration is determined by combining the established local finite element model.Finally,the corresponding vibration control measures are put forward.The results show that the vertical vibration of the power station floor is mainly caused by the power equipment,and the consolidation of the pipeline and the floor and the pipeline through the wall are the main reasons for the vibration to be transmitted to the floor.The direct transmission from the pipe support to the floor is the most influential vibration transmission path;the installation of the pipeline vibration reduction support can reduce the vertical vibration acceleration of the floor by more than 79%,which meets the requirements of vibration comfort.