水中爆炸冲击下混凝土坝动力响应的全耦合分析

Full Coupled Simulation of Concrete Dams Subjected to Underwater Explosion

针对水下爆炸的物理过程以及由此引起的混凝土重力坝的动力响应的复杂性.建立了全耦合的模型,考虑了炸药的爆炸、爆炸波的水中传播、水介质与坝体结构的相互作用,对混凝土重力坝的动力响应进行了模拟,得出了坝体的加速度响应以及位移的时程变化特点.结果表明:该方法可应用于研究由于爆炸引起的结构动力响应问题,弥补了试验研究的不足.

Physical processes during an explosion in water and the response of dams are extremely complicated. A dynamic finite element model was developed to precisely analyze the complex processes. The dynamic response of concrete gravity dams subjected to underwater explosion loading was simulated using the full coupled model including the propagation of shock wave and the interaction between water and the structure. The variety of the pressure in water, acceleration and stress of dams were obtained. The analytical results are applicable to design and defense of concrete gravity dams.