Open Access This is an open access article distributed under the CC BY-NC license ( ). And the step potential is: ESTEP I(RB + 6S) (2) For the touch potential, consider: R1 1.5S 1. For the step potential circuit, we have two feet in series, the contact resistance R1 is, therefore, equal to 6S. The fatigue strength analysis method of aluminum alloy car body provides the reference data for lightweight design of car body. 652 Transportation Research Circular E-C058: 9th National Light Rail Transit Conference FIGURE 1 Human body current electrical model. The results show that under the static strength load cases, the maximum equivalent stress of car body which appears in the corner of the door is 225.481MPa and the maximum vertical deformation of car body is 6.87mm, both of them meet the static strength and stiffness requirements Under the fatigue load cases, the minimum safety factor of car body fatigue strength is 2.41,which meets the fatigue strength requirement. After calculating and preparing post-processing analysis program, the car body fatigue strength was evaluated. The static strength and fatigue strength analysis load cases of car body were determined based on the EN 12663 standard.
The car body finite element model was established. In order to analyze the fatigue strength of aluminum alloy car body, the Goodman fatigue limit diagram was drawn according to the mechanical characteristics of aluminum alloy. As the aluminum alloy car body was used to the lightweight design of railway vehicle, the fatigue reliability has become a key issue. European railcar manufacturer Stadler Rail needed to ensure the crashworthiness of a new bi-level passenger car (KISS) and the performance of its crash module.
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