波形复现吸能器的原理分析及仿真

Principle analysis and simulation on wave regained energy absorber

对自行设计的波形复现吸能器的结构和原理进行分析,利用LS-DYNA有限元分析软件对该吸能器进行仿真。该吸能器利用销柱间钢筋预变形产生阻尼力,通过改变钢筋的类型、数量、长度和位置等复现出所期望的减速度波形。仿真与试验结果的比较表明:波形复现吸能器仿真模型复现的波形和台车碰撞试验的波形吻合较好。试验结果验证了吸能器仿真模型的正确性,仿真方法为吸能器的调试提供了依据,缩短了调试时间,提高了波形复现的精度。

First the structure and principle of wave regained energy absorber is analyzed, and then the energy absorber by LS-DYNA is simulated. By using damping force between steel and columniation after pre-deformed and by adjusting the type, quantity, length, position of the steel bar, changing the pre-deformation of the steel bar, all kinds of deceleration curve can be repeated. Compare simulation result with test result, it＇ s suggested that the simulation wave is agreed with the test wave of sled test impact. The test result validated the simulation model of energy absorber .The method can apply to debugging the energy absorber. It save time of debugging and improve the precision of wave.