【摘要】 随着我国电子产业的高速发展和生产工艺的进步,电子厂房类项目对微振控制提出更高的要求。为此,以上海某电子厂房为背景工程,通过ABAQUS软件建立结构的有限元模型,并对厂房现场的环境振动进行实测,在此基础上分析结构的微振响应,利用国际通用的VC(vibration criterion)标准对微振响应进行评价。在厂房原结构的基础上,进一步进行优化设计分析,分析结构参数对微振响应的影响规律,并通过橡胶支座和空气弹簧构建双层隔振平台,分析隔振平台及相关参数对微振控制的影响。结果表明:在进行厂房结构设计时,影响较大的因素是梁、板截面尺寸,而柱截面尺寸对结构微振响应的影响较小;当结构构件尺寸较大时,增大构件尺寸带来的减振效果提升有限,通过隔振装置能更有效的降低微振响应;由于受到刚度的限制,橡胶支座等线性隔振装置对竖向微振响应控制效果有限,而空气弹簧作为非线性隔振装置,对微振具有更好的控制效果,能够使1/3倍频程速度响应最大降低了37.49%。更多还原

【Abstract】 The rapid advancement of electronics industry and manufacturing technology in China has imposed increasingly stringent requirements on micro-vibration control in electronic factory construction. For this purpose, a finite element model of the structure was developed using ABAQUS software, based on an electronic factory building in Shanghai. The environmental vibration of the factory building was measured. Based on the finite element model and environmental vibration excitation, the micro-vibration response of the structure was analyzed and a globally recognized vibration criterion(VC) was employed for its evaluation. Based on the original structure of the factory building, a study of the optimal design was conducted, and the effect of structural layout on the micro-vibration response was investigated. In addition, a 2-layer isolation platform implemented by rubber bearings and air springs was constructed, and the influence of the isolation platform and the related parameters of the isolation devices on micro-vibration control was investigated. The results show that with respect to structural layouts, the cross-sectional dimensions of beams and slabs have the most significant influence, whereas the cross-sectional dimensions of columns have a minor impact on the micro-vibration response of the structure. When the dimensions of structural components reach a high level, further increasing cross-sectional dimensions yields limited improvement in structural micro-vibration control. At this stage, isolators provide a more effective control. Due to the constraint of stiffness,linear isolators such as rubber isolators exhibit limited effectiveness in vertical micro-vibration control, whereas air springs, as nonlinear isolators, demonstrate superior performance and reduce the maximum one-third octave band velocity response by 37. 49%.更多还原