Based on the analysis of the mode and root cause of the wire harness shielding failure, it is not difficult to summarize the solution to the wire harness shielding failure, that is, to clarify the contribution of the parameters of the wire harness to the electromagnetic interference in the current vehicle environment in the design stage, and design the wiring harness layout based on this . Then model and analyze whether the layout plan can meet the shielding requirements, and carry out bench verification. Finally, the vehicle durability test verifies the electromagnetic shielding performance of the wiring harness.
In the verification stage, it is enough to strictly implement the test program, and the most difficult part of the solution lies in the establishment of the shielding model. The establishment of the shielding model needs to strictly consider the number of vehicle interference sources, the approximate intensity of interference, the characteristics of interference sources and the corresponding failure modes. After building the model, compare the simulation results with the actual performance of the bench to ensure that the simulation results are consistent with the actual performance. When the results are inconsistent, adjust the model parameters to make the model consistent with the actual performance.