随着高速列车运行速度的快速提高，产生了高速列车橡胶风挡风致大变形振动现象，造成列车行驶噪音和阻力骤增，长期服役后导致风挡连接件产生疲劳。采用实验手段解决该问题很难满足刚度相似准则，迫切需要发展高效可靠的数值模拟手段，解决其中的带接触流固耦合共性科学问题，提高风挡气动弹性设计水平，在设计阶段扼杀橡胶风挡风致大变形振动隐患。本项目选用便于自适应加密的非结构笛卡尔网格，利用光滑有限元法对任意形状单元的极好适应性，解决流体单相和固体单相中带悬挂节点单元的处理难题，和笛卡尔网格对复杂边界的适应性问题。在此基础之上，拟采用增强的浸没边界方法耦合流固两相，解决流体中带多固体接触模拟难题，形成具有自适应分析能力的流固耦合数值模拟平台，完成高速列车风挡风致大变形振动等问题的有效模拟。

The wind-induced large deformation of rubber windshield has emerged due to rapid increasing speed of high-speed train. This phenomenon cause the rapid increase of noise and drag for running train, and the fatigue of the connection structure between windshield and train body after long-time service. Since the experimental approach is difficult to satisfy the stiffness similarity law, it is urgent to develop an efficient and reliable numerical simulation technique to deal with its contact-involved strong fluid-structure interaction. With the help of this numerical simulation technique, the aero-elasticity design capability of rubber windshield will be largely improved, which can strangle the corresponding risk in the cradle. In this project, the unstructured Cartesian mesh is chosen to exploit its remarkable adaptive refinement capability. Besides, the Smoothed Finite Element Method (S-FEM) is adopted to deal with hanging nodes issue and adaptation of complex boundaries when using Cartesian mesh. Then, an enhanced immersed boundary method is developed to couple fluid phase and solid phase S-FEMs and tackle the difficulties on contacts between immersed solids. Based on above researches, an adaptive fluid-structure interaction numerical simulation platform will be constructed which can achieve the effective simulation of high-speed train windshield large vibration induced by high-speed airflow.