悬吊式空调机组支吊架的谱分析及抗震评定  

Spectrum Analysis and Seismic Evaluation of Support and Hanger of Suspension Air Conditioning Unit

作　　者：王和慧[1] 刘雨欣 汤毅 朱进林 潘健 WANG Hehui;LIU Yuxin;TANG Yi;ZHU Jinlin;PAN Jian(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Installation Engineering Group Co.,Ltd.,Shanghai 200080,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]上海市安装工程集团有限公司,上海200080

出　　处：《郑州大学学报（工学版）》2023年第1期58-64,共7页Journal of Zhengzhou University（Engineering Science）

基　　金：国家重点研发计划项目(2018YFC0705800)。

摘　　要：基于反应谱分析方法,应用ANSYS有限元软件及其APDL编程,采用空间梁单元、3D纵向弹簧阻尼单元和实体单元建立完整反映结构特性的三维有限元模型,对某空调机组悬吊式安装方式下的支吊架进行抗震计算。考虑静力载荷和运行基准地震(OBE)载荷进行静力分析,然后在此基础上进行模态分析和OBE载荷下的多点响应谱分析,按照模态组合的平方和之开根号法(SRSS法)综合静力分析和谱分析的计算结果,依据ASME AG-1规范,对支吊架的强度和刚度进行抗震评定。结果表明:在静力载荷和OBE载荷的组合工况作用下,支吊架的拉应力、剪应力、弯曲应力及拉弯组合均小于应力限制值,安全余量很大;支吊架的位移大部分来自于弹簧阻尼减振器收缩引起的整个系统的刚性位移,其余来自于槽钢底框的相对位移,二者的刚度都满足要求且安全余量较大;支吊架根部的膨胀螺栓主要受拉力的作用,其强度满足要求且安全余量较大。经评定,该悬吊式空调机组支吊架具备足够的抗震强度和刚度。Based on the response spectrum analysis method,ANSYS finite element software and its APDL program-ming,the three-dimensional finite element model that could fully reflect the structural characteristics was estab-lished by using the spatial beam element,3D longitudinal spring damping element and solid element.And the seis-mic calculation of support and hanger of an air conditioning unit in suspension installation mode was carried out.Considering the static load and OBE seismic load,the static analysis was carried out firstly,and then the modal a-nalysis and multi-point response spectrum analysis of OBE seismic load were carried out.Finally,according to the calculation results of static analysis and spectrum analysis by the square root of sum square method(SRSS method)of the modal combination,based on ASME AG-1 codes,the strength and stiffness of support and hanger were sub-jected to seismic evaluation.The results showed that with the combination of static load and OBE seismic load,the tensile stress,shear stress,bending stress and tensile-bending combination of the support and hanger were less than the stress limit,and had a wide margin of safety.Most of the displacement of the support and hanger come from the rigid displacement of the whole system caused by the shrinkage of spring dampers,and the rest came from the rela-tive displacement of the channel steel bottom frame,both of which could meet the requirements and have a large safety margin.Expansion bolts at the root of the support and hanger were mainly affected by the tension,and their strength could meet the requirements and the safety margin was large.The evaluation showed that the support and hanger of the suspended air conditioning unit had sufficient seismic strength and stiffness.

关 键 词：悬吊式空调机组 支吊架 谱分析 ASME AG-1规范 抗震评定 

分 类 号：TU311.3[建筑科学—结构工程]