SPH方法在剪切式碰撞能量吸收器中的应用  

APPLYING SPH METHOD TO SHEARING ENERGY ABSORBERS

作　　者：许庆新[1] 沈荣瀛[1] 周海亭[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200030

出　　处：《振动与冲击》2007年第9期108-111,共4页Journal of Vibration and Shock

摘　　要：剪切式碰撞能量吸收器是提高汽车被动安全性的一种实用新型设计。建立了剪切式碰撞能量吸收器数值分析模型,采用SPH方法数值模拟了碰撞吸能器的碰撞过程,研究了其碰撞吸能特性,并通过不同碰撞速度的台车碰撞试验进行了试验验证研究。数值模拟结果同试验结果相符,表明SPH方法在碰撞吸能器性能研究中是行之有效的数值计算方法。同时分析了在碰撞吸能器的复杂碰撞情况下,SPH方法相比有限元法的优势。A new type of energy absorber is introduced, which absorbs the impact energy by mechanical shearing of a stack of thin metal sheet. Shearing procedure of energy absorber is simulated by smoothed particle hydrodynamics (SPH) method, and its characteristics are discussed. SPH method is proved to be suitable for studying shearing energy absorber, by comparing the results of SPH method to those of a sled crash test. The study shows that SPH method has the advantages over FEM in complex contacts of shearing energy absorber.

关 键 词：振动与冲击 碰撞 剪切 能量吸收器 SPH方法 

分 类 号：O347[理学—固体力学]