基于统一场景的重力坝极端动力灾害链传递混合模拟方法

针对水电工程多灾害耦合效应连续模拟数据传递困难且缺乏全过程顺次模拟工具等问题，结合灾害链传递过程中的关键节点及参数，提出了多种数值模拟工具和物理引擎耦合的动力灾害链传递混合模拟方法。该方法采用数值模拟工具得到结构强度、变形等物理场及破坏模式，通过二次开发将物理场变量及结构破坏模式映射进入物理引擎，基于计算流体力学方法和物理引擎模拟方法顺次混合模拟结构损毁后的块体运动、库水下泄和洪水演进过程，从而实现极端动力灾害链传递的全过程模拟。某重力坝枢纽极端爆炸毁伤事故动力灾害链传递验证结果表明，该方法克服了单一数值模拟工具的局限性，实现了从原生灾害的结构响应到次生灾害演进全过程的集成一体化仿真预演，在计算精度和效率方面均达到工程应用尺度上较为理想的效果。

Hybrid simulation method of extreme dynamic disaster chain transfer for gravity dams based on unified scene

Aiming at the problems such as the difficulty of continuous simulation data transfer of multi-hazard coupling effect in hydropower engineering and the lack of full-process sequential simulation tools, a hybrid simulation method of dynamic disaster chain transfer coupled with multiple numerical simulation tools and physics engine was proposed by considering the key nodes and parameters in the process of disaster chain transfer. The method adopts numerical simulation tools to obtain physical fields and damage patterns such as structural strength and deformation, maps the physical field variables and structural damage patterns into the physics engine through secondary development. The block movement, reservoir underflow, and flood evolution process after structural damage based on computational fluid dynamics and physics engine simulation methods in a mixed sequence are then simulated to realize the whole process of simulation for the transfer of the extreme dynamic disaster chain. The validation results of an extreme explosion damage accident in a gravity dam hub show that the method overcomes the limitations of single numerical simulation tool, realizes the integrated simulation preview from the structural response of the primary disaster to the whole process of the secondary disaster evolution, and achieves the more desirable effect in terms of precision and efficiency on the scale of engineering application.