Study On Integrated Structural-Electromagnetic-Thermal Optimization For Electronic Cabinets

Three physical fields, that are structural displacement field, temperature field and electromagnetic field, are involved during the analysis and design of electronic cabinets. Generally speaking, the interaction effects between one another of these three fields are often needed to be considered during the design process. In this paper, the integrated three fields optimization problem for electronic cabinets are investigated by considering the impacts of displacement field on the temperature and electromagnetic fields. The main works are as follows.1) The process of three-field integrated simulation analysis for electronic cabinets is introduced with emphases on the transformation scheme of displacement data into the other two fields and the unified mesh model for the three fields. The three-field integrated optimization model for electronic cabinets is constructed and the optimization flow chat is given.2) The characteristics of the integrated three-field optimization problem for electronic cabinets were analyzed and summarized. A method for handling the"simple algebraic constraints", which is frequently appearing in optimization of cabinets, was proposed. In order to filter the numerical noise, a Kriging model based optimization strategy was introduced and compared with some traditional algorithms by an example. The results show that this strategy is more efficient for solving the integrated optimization problems for electronic cabinets.3) A software module for three-field integrated optimization of electronic cabinets was developed. The functional interface and the interface protocols among several commercial softwares were designed. Some key technologies, such as the interface between iSIGHT and Ansys Workbench and the generalization problem of the software were introduced in detail.4) A forced air cooling electronic cabinet was optimized by considering the fundamental frequency, heat dissipation performance and electromagnetic shielding performance. The optimal placement of the vents and position of the windshield plate were obtained, which satisfy all the three-field performance requirements.