柔性电缆等效模型对跨越架防护网的冲击响应分析

Analysis of the Impact of Equivalent Model of Flexible Cable on Crossing Pole Protective Net

针对柔性电缆碰撞冲击柔性体的问题.本文以跨越架防护网系统为研究对象,将日本道路公团算法以及有关试验数据基础上研究的落石冲击力计算方法应用在导线对防护网的冲击问题上,通过理论计算得出了防护网架体固定端的受力.同时利用ANSYS/LS-DYNA软件建立电缆冲击防护网系统的有限元等效模型.等效模型中以质量块和棒料代替等质量的断裂电缆.分别计算了不同工况条件下等效物体冲击柔性防护网时跨越架架体固定端的受力.仿真结果验证了理论计算的准确性.该计算有效解决了柔性体之间碰撞冲击力难以计算的问题,为跨越架的设计提供了受载分析的依据.

Aiming at the problem of flexible cable impact flexible object,this paper takes the crossing pole protective net as the research object and uses the algorithm proposed by Japanese Road Association,and the relevant test data on impact force calculation.By theoretical calculation,the fixed end force of the protective net frame is calculated.Using ANSYS/LS-DYNA software to establish the finite element equivalent model of fault cable impact protection network system,and then the fixed end force of the protective net frame is calculated.In the equivalent model,the fault cable is replaced by the mass and the stick.The fixed end forces under different conditions are calculated respectively.So that the problem of the impact force of flexible body which is hard to calculate is solved.The results provide a basis for designing crossing poles.