新型索网与钢管结构抗冲击性能数值模拟与实验

Numerical simulation and experimental study on the impact resistance of a new cable net and steel tube structure

针对泥石流块石灾害频繁发生,提出了一种新型索网与钢管结构.通过固体球形块石冲击实验研究了该结构的冲击动力响应,对实验进行数值模拟,对比模拟与实际测试结果.通过数值模拟方法对结构进行参数分析,得到结构的破坏模式.结果表明,结构有3种破坏模式,冲击物的质量、冲击物的速度和冲击高度影响结构的抗冲击性能.

In view of the frequent disasters occurrence of debris flows,a new type of cable net and steel tube structure was proposed.The impact dynamic response of the structure was studied via the impact test of solid round blocks,and the numerical simulation was carried out to compare the simulation results with the test results.Through the numerical simulation method,the structural parameters were analyzed and the failure mode of the structure was obtained.The results showed that there were three failure modes of the structure,and the impact quality,velocity and height of the impact could affect the impact resistance of the structure.