Analysis of inapplicability of residual magnetism method in investigation of vehicle fire cause
Residual magnetism method often encounters legal dis-putes in the practice of investigating the causes of vehicle fire.In order to explore whether the residual magnetism method is appli-cable to vehicle fire,four simulation experiments were designed and conducted based on the characteristics of vehicle electrical fire.The results indicate that the electrical short-circuit energy in-side the engine compartment is insufficient to cause changes in the residual magnetic field of the vehicle body.Certain locations in the engine compartment and vehicle body exhibit inherently higher residual magnetic values,causing interference in the re-sidual magnetism method.Additionally,the effect of high tem-peratures during a fire and post-fire towing and maintenance op-erations can cause the magnetic properties to fade,affecting the measurement of the vehicle′s remanent magnetization value.Ulti-mately,it is confirmed that the residual magnetism method is not suitable for the investigation and determination of the causes of ve-hicle fire.
NETL
NSTL
万方数据
维普
