Evaluation of coupled finite element/meshfree method for a robust full-scale crashworthiness simulation of railway vehicles

Evaluation of coupled finite element/meshfree method for a robust full-scale crashworthiness simulation of railway vehicles

Blog Article

The crashworthiness of a railway vehicle relates to its passive safety performance.Due to mesh distortion and difficulty in controlling the hourglass energy, conventional finite element methods face great challenges in crashworthiness simulation of large-scale complex railway vehicle models.Meshfree methods such as element-free nacrack.com Galerkin method offer an alternative approach to overcome those limitations but have proved time-consuming.

In this article, a coupled finite element/meshfree method is proposed to study the crashworthiness of railway vehicles.A representative scenario, in which the leading vehicle of a high-speed train impacts to a rigid wall, is simulated with the coupled finite element/element-free Galerkin method in LS-DYNA.We have compared the conventional finite element method and the coupled finite element/element-free Galerkin method with the simulation results of different levels of discretization.

Our read more work showed that coupled finite element/element-free Galerkin method is a suitable alternative of finite element method to handle the nonlinear deformation in full-size railway vehicle crashworthiness simulation.The coupled method can reduce the hourglass energy in finite element simulation, to produce robust simulation.