Lightning Effects Simulation for Indirect Effects

Numerical simulation of indirect effects of lightning on a multibranched engine control wiring harness set was developed using the MHARNESS* simulation code. Electrical parameters of the harnesses and subassemblies were measured and entered into the analytical model. Results of the analytical model for bundle current distribution and harness attenuation for a lightning pulse were compared against actual test data. Close correlation was obtained in most branches. Further work to optimize the model and add sensor and actuator loads will be conducted in the near future, and sensitivity analysis will be performed on various harness parameters and bonding impedance.