基于CST的车辆线束电磁脉冲效应仿真研究

Simulation Research on Electromagnetic PulseEffect of Vehicle Harness Based on CST

针对等效线束法建模难、计算效率低的问题,探讨了车辆线束在电磁脉冲辐照下不同参数的耦合效应,以提高仿真效率,并分析了车辆线束中相关参数对线束电磁脉冲耦合的影响。首先,分析了车辆线束数量对线束电磁耦合效应的影响,通过控制变量法,改变线束中的线缆数量,观察线束中耦合电压的最大值。然后,改变线缆尺寸和负载电阻,观察线束中耦合电压电流最大值的变化。仿真结果表明,耦合电压的峰值随线缆数量的增大而减小,随线缆尺寸的增大而增大,并且都呈线性变化;耦合电流的峰值随负载电阻的增大而减小,呈幂级数关系。最后,结合仿真结果,对不同参数下的最大耦合电压电流进行拟合,得出其之间的关系,为车辆线束的电磁防护工作提供参考。

Aiming at the problems of difficult modeling and low calculation efficiency of equivalent harness method,the effect of electromagnetic pulse radiation on the vehicle harness is studied using CST(Computer Simulation Technology).The influence of the number of vehicle cables on the electromagnetic coupling effect of the harness is analyzed.By controlling the variables,we changed the number of cables in the harness and observed the maximum value of the coupling voltage in the harness.We also studied the maximum coupling voltage and current in the harness by varying the cable size and load resistance.The simulation results show that the peak value of the coupling voltage decreases linearly with an increase in the number of cables and increases linearly with an increase in cable size.The peak value of the coupling current decreases with an increase in load resistance,which follows a power series relationship.Finally,we combined the simulation results and fitted the maximum coupling voltage and current under different parameters,drawing a conclusion about the relationship between them,which provides a reference for the electromagnetic protection of vehicle wiring harnesses.