汽车车身缝隙的电磁屏蔽特性仿真研究  

A Research of the Simulation on the Electromagnetic Shielding Effectiveness of Vehicle Body Seams

作　　者：徐中明[1] 杜明磊[1] 丁良旭[2] 刘青松[3,2] 

机构地区：[1]重庆大学机械工程学院,重庆400044 [2]重庆车辆检测研究院有限公司,重庆401122 [3]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《汽车工程》2011年第8期723-727,737,共6页Automotive Engineering

摘　　要：汽车车身缝隙是汽车电磁干扰的重要耦合途径。通过分析汽车车身缝隙的结构,提出车身缝隙的简化模型,进而建立其仿真计算模型;分别改变车身缝隙模型的相关结构参数,考察相应的电磁场屏蔽效能的变化。仿真结果表明,车身缝隙越长,屏蔽效能越低,电磁干扰越容易耦合进车内;车身缝隙越窄,电磁屏蔽效能越高;改变车身缝隙搭接部分的长度和拐角角度并不能保证提高其屏蔽效能,具体变化趋势与频率范围有关。Vehicle body gap is the important coupling way of vehicle electromagnetic interference.Based on the analysis on the structure of vehicle body gap,a simplified model for vehicle body gap is put forward,and then its simulation model is established.The related structural parameters of vehicle body gap are changed respectively,to investigate the corresponding variation in the electromagnetic shielding effectiveness of vehicle body gap.The results of simulation show that the longer the vehicle body gap is,the lower its shielding effectiveness is,and the easier electromagnetic interference coupling into vehicle.The narrower the body gap is,the higher its shielding effectiveness is.Changing neither the length of overlapping gap nor the angle of turning corner can assure the rise in shielding effectiveness,rather the specific changing trend is related to frequency range.

关 键 词：车身缝隙 电磁屏蔽效能 有限积分法 搭接缝隙 

分 类 号：U463.6[机械工程—车辆工程]