中风化花岗岩地区洁净厂房地面随机振动响应分析

现代高科技生产设备对振动的要求越来越严格,在某洁净厂房的建设过程中,由于生产线扩大,需要将生产厂房的部分非微振区改建为微振区。本文针对生产厂房整体结构在地面环境随机振动下的微振动问题,建立了生产厂房的有限元动力分析模型。以实测的自由场地微振动加速度时程为激励,对结构系统的随机振动响应情况进行分析。并对3种工况情况下,结构特定节点的振动情况进行对比分析,表明加密柱网能够有效减小结构振动,从而为工程设计提出合理建议。

ANALYSIS ON GROUND RANDOM VIBRATION RESPONSE OF CLEAR WORKSHOP IN MEDIUM-WEATHERED GRANITE AREA

Modern high-tech equipments have more and more strict requests on vibration, in the construction process of a clear workshop, we need to reconstruct parts of non-micro-vibration zone of the workshop into micro-vibration zone for expanding the production lines. In this paper, the finite element model of the clear workshop was established to analysis the micro-vibration problem, which was caused by ground random vibration. The acceleration time series measured on the ground as excitation, the random vibratory response of the workshop structure was analyzed. For three different cases, the vibrations of particular nodes in the structure model were compared, the results indicated that increased pillars could effectively reduce the vibration of the structure, consequently, reasonable proposals for engineering design were put forward.