Vehicle door fatigue simulation analysis method

Abstract

The invention discloses a vehicle door fatigue simulation analysis method, and the method at least comprises the following steps: S1, carrying out the finite element discretization mesh generation ofa vehicle door; S3, conducting vehicle door model connection; S5, carrying out door lock mesh-free modeling simulation; and S7, conducting fatigue solving and result interpretation on vehicle door simulation. Therefore, the problem of sharp oscillation of energy at the moment of closing the door due to the fact that a vehicle door lock adopts a physical unit defect can be avoided, and meanwhile, the transmission of vehicle door closing energy can be simulated more truly, so that the stress of the vehicle door is closer to the real door closing process to accurately predict the dangerous position and the door closing service life in vehicle door fatigue; and effective improvement suggestions are provided for design, so that design errors are reduced, the research and development period is shortened, and later rectification waste is avoided.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a method for simulation and analysis of vehicle door fatigue. Background technique [0002] During the design and development process of the car door, the door fatigue can be simulated and analyzed by modeling. [0003] In the related art, a solid finite element model of the door lock is established, and since a discrete door lock entity is required, discretized bumps will be generated in the door lock. During the door closing simulation solution process, due to the presence of such uneven defects, the energy at the moment of door closing is violently oscillated, making the overall energy diffusion of the door unable to truly simulate the energy diffusion of the real physical door closing, resulting in the failure of the prediction accuracy of the door fatigue simulation. Realistic estimation of door closing life makes simulation unable to accurately predict the real ...

AI Technical Summary

Problems solved by technology

[0003] In the related technology, the door lock establishes a solid finite element model. Since the door lock entity needs to be discrete, it will cause discretized bumps in the door lock.

During the door closing simulation solution process, due to the presence of such uneven defects, the energy at the moment of door closing is violently oscillated, making the overall energy diffusion of the door unable to truly simulate the energy diffusion of the real physical door closing, resulting in the failure of the prediction accuracy of the door fatigue simulation. Realistic estimation of door closing life makes simulation unable to accurately predict the real fatigue life damage of the designed product, thus making it impossible to provide effective improvement suggestions for the door structure design

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