Some analysis must be done previously for coupling analysis of flow and structure, such as characteristics of complex unsteady aerodynamic force, vortices shedding frequency, vibration mode and vibration characteristic of blade, etc.

• 分析叶轮机械通道内部复杂非定常气动力特征和旋涡频率特性,掌握叶片的振动特性、叶片的振动模态,是采用流/构耦合分析研究叶片振动的前提。