基于数值模拟的半刚性护栏性能优化  

Behavior Optimization of Semi-Rigid Guardrail Based on Numerical Simulation

作　　者：张鹏[1] 周德源[1] 冯英攀[2] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092 [2]北京奔驰-戴姆勒·克莱斯勒汽车有限公司,北京100022

出　　处：《同济大学学报（自然科学版）》2008年第11期1531-1536,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目(50538050)

摘　　要：ANSYS/LS-DYNA数值模拟的计算结果表明,按规范设计的波形梁Ⅰ型(WBSGⅠ)护栏在车辆与刚性护栏的碰撞过程中,不能满足承载力要求,导向性差,有可能发生车辆越出护栏的坠车事故.参考东海大桥的护栏设计标准(TBSG),对规范中护栏各部件的设计参数做出调整,设计出波形梁Ⅱ型(WBSGⅡ)护栏.模拟结果表明,该护栏提高了护栏的安全性和车辆导向性.计算结果可为实车试验和工程实际应用提供参考依据.Simulation results based on ANSYS/LS-DYNA show that WBSG Ⅰ designed according to the guardrail code can not sustain the bearing load, and has worse guiding behavior and less safety in comparison with TBSG. With a reference to the design criterion of guardrail on East Sea Bridge, the thickness of components is increased in WBSG Ⅰ , and the FE model of WBSG Ⅱ is established. Simulation results indicate that WBSG Ⅱ is much safer and has better guiding behavior than WBSG Ⅰ , and provides a reference for practical impacting test and semi-rigid guardrail design.

关 键 词：半刚性护栏 冲击 ANSYS/LS-DYNA 数值模拟 优化 

分 类 号：O242.21[理学—计算数学] U417.12[理学—数学]