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水平冲击荷载是更贴近于现实生活中外部物质碰撞、泥石流地质灾害、恐怖袭击等的冲击荷载类型.首先介绍了冲击荷载作用的分析方法,然后在ANSYS/LS-DYNA软件中建立了跨度60m的K6型单层球面网壳抗水平冲击模型,不断变换冲击物的质量和速度对结构进行冲击.结果表明,水平冲击荷载作用下结构的动力响应过程可以分为五个关键性阶段和三种冲击模式;随着冲击物质量与速度的不断增加,网壳水平向变形、主要杆件受力和冲击力会不断增大,当质量与速度增加到一定值后,三者均不再变化;在整个冲击过程中的能量损失会随冲击力的增大而增多.
The horizontal impact load is a type of impact load that is more close to the impact of external material collision in real life, geological disasters such as debris flow, terrorist attack, etc. First, the analysis method of impact load is introduced, and then the ANSYS / LS- K6 single-layer spherical reticulated shell against horizontal impact model, changing the mass and velocity of the impacting object to impact the structure.The results show that the dynamic response of the structure under horizontal impact load can be divided into five key stages and three types of impact Mode; As the mass and velocity of the impactor increases, the reticulated shell deforms horizontally, and the force and impact force of the main bar will continue to increase. When the mass and velocity increase to a certain value, the three no longer change. The energy loss during the whole impact will increase with the increase of impact force.