某型抽吸式地震救援机消能装置数值分析

Numerical analysis of energy dissipation device of a certain suction type earthquake rescue machine

设计了一种抽吸式地震救援机的消能装置,用于降低吸入箱内大颗粒物料的冲击速度,从而防止箱体撞击造成损坏。本文基于耦合欧拉-拉格朗日(CEL)方法对大颗粒物料的消能过程进行数值模拟,首先用Creo建立并简化沉降箱和消能装置的三维模型;然后在Hypermesh中对简化后的三维模型进行网格划分;最后在Abaqus中基于CEL方法建立有限元计算模型并求解。分析结果表明:粒径100 mm的大型颗粒高速撞击吸能链条后,其速度由23.4 m/s降低到14.7 m/s,动能降低60.5%,大幅降低了对箱体的撞击强度。本研究对不可忽略流体作用的碰撞研究具有较大的参考价值。

An energy dissipation device for a suction-type earthquake rescue machine was designed to reduce the impact velocity of the large-particle materials in the suction box,thereby preventing damage caused by the impact of the box.In this paper,based on the coupled Euler-Lagrange(CEL)method,the energy dissipation process of large particle materials was numerically simulated.Firstly,the 3D models of the settlement tank and energy dissipation device were built and simplified by Creo,the simplified 3D model then meshed in Hypermesh,the finite element calculation model was built and solved in Abaqus based on the CEL method.The analysis results show that after the large particle with a particle size of 100 mm hits the chain at high speed,its speed is reduced from 23.4 m/s to 14.7 m/s,and its kinetic energy is reduced by 60.5%,which greatly reduces the impact strength on the box.This study has great reference value for collision studies with non-negligible fluid effects.