【摘要】 描述了安装在地基里的护栏立柱实用的有限元模型。立柱 地基相互作用由一列非线性未耦合的弹簧建模。由非线性显示有限元程序LS DYNA3D分析,通过用弹性摆撞击埋在地基里的立柱测试结果进行比较,结果表明,立柱 地基模型是有效的、切实可行的,并可应用在护栏模型里。更多还原

【Abstract】 This paper describes the development of a finite element model of a guardrail post mounted in soil. The post-soil interaction is modeled using the subgrade reaction method assuming the posts are supported by an array of nonlinear, uncoupled springs. The analysis is carried out using the (nonlinear), explicit finite element program LS-DYNA3D. The results are compared with data from physical tests using a ballistic pendulum impacting soil-mounted guardrail posts. The results show that the post-soil model is efficient and practical and is being used in models of guardrails and guardrail terminals that involve many soil-mounted posts.更多还原