一种大型屏蔽扩展侧舱结构有限元分析及优化

Finite Element Analysis and Optimization of Side Module Structure of a Large Expandable Electromagnetic Shielding Shelter

对于屏蔽扩展舱来说,更大的使用面积能够满足更多的空间需求,但扩展侧舱尺寸越大,要求侧舱强度越高,否则侧舱的变形很容易导致整舱屏蔽效能失效;因此,对于大型屏蔽扩展侧舱,应先对舱体结构进行有限元分析。某屏蔽扩展方舱项目的侧舱长7m多,先对侧舱建立三维建模,然后对模型进行有限元应力应变分析。根据分析结果对侧舱结构进行优化改进,对改进后的侧舱再次进行有限元分析,结构强度满足要求。分析时没有考虑蒙皮、泡沫以及一体化设计等因素,实际结构强度会更强,并且方舱装配完成后,实际舱体变形更小,完全能够满足实际使用要求。

For the expandable electromagnetic shielding shelter, a large utilization area can meet more space requirement. However, the larger the size of the extended side module is, the higher the strength of the shelter is. Otherwise, the de- formation of the side module will easily lead to the failure of the whole shelter screening effectiveness. Therefore, the finite element analysis to the structure of a large expansion side of a shelter is necessary firstly. In order to meet the needs of a certain project, a three-dimensional model of the side module with a length of more than 7 meters is first carried out. Then the finite element stress and strain analysis of the model is carried out. According to the analysis results, the structure of the side module is optimized and improved. The finite element analysis of the new model shows that the new structural strength meets the requirements. The analysis does not take into account the skin, foam and integrated design and other factors, the actual structural strength will be stronger, fully meet the praetieal reouirements.