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Spectrum Analysis and Seismic Evaluation of Support and Hanger of Suspension Air Conditioning Unit
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[1]WANG Hehui,LIU Yuxin,TANG Yi,et al.Spectrum Analysis and Seismic Evaluation of Support and Hanger of Suspension Air Conditioning Unit[J].Journal of Zhengzhou University (Engineering Science),2023,44(01):58-64.[doi:10.13705/j.issn.1671-6833.2023.01.009]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 44卷 Number of periods: 2023 01 Page number: 58-64 Column: Public date: 2022-12-06
Title:
Spectrum Analysis and Seismic Evaluation of Support and Hanger of Suspension Air Conditioning Unit
Author(s):
WANG Hehui1;  LIU Yuxin1;  TANG Yi2;  ZHU Jinlin2;  PAN Jian2
1.School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China; 2.Shanghai Installation Engineering Group Co., Ltd., Shanghai 200080, China
Keywords:
suspension air conditioning unit;  support and hanger;  spectrum analysis;  ASME AG-1 codes;  safety assessment
CLC:
TU311. 3
DOI:
10.13705/j.issn.1671-6833.2023.01.009
Abstract:
Based on the response spectrum analysis method, ANSYS finite element software and its APDL programming, the three-dimensional finite element model that could fully reflect the structural characteristics was established by using the spatial beam element, 3D longitudinal spring damping element and solid element. And the seismic 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 analysis 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 subjected 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 relative 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.
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Last Update: 2022-12-07
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