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基于高压转子开展高压(HP)涡轮转子叶片叶尖变形分析可提高叶尖间隙的数值模拟精度,而高压涡轮转子叶片由于其复杂的气冷结构,有限元分析网格数量巨大;叶片和轮盘的榫接结构属于非线性分析,也需要足够的计算机时。针对该问题提出了一种复杂气冷叶片的简化方法和榫接结构接触计算简化方法,在不影响计算精度的前提下提高计算效率。采用该方法对典型结构高压涡轮转子进行了变形分析,与采用复杂气冷叶片模型和接触分析方法的变形分析结果进行比较。结果表明:涡轮叶片叶尖最大径向变形相对误差为0.47%,计算机时减少99%,证明简化方法和计算方法的有效性。
Based on the high-pressure rotor to carry out high-pressure (HP) turbine blade tip deformation analysis can improve the tip clearance numerical simulation accuracy, and high-pressure turbine rotor blade due to its complex air-cooled structure, the finite element analysis of a huge number of grid; blade and disk The mortise and tenon joints are non-linear analysis and also need enough computer time. Aiming at this problem, a simplified method of complicated air-cooled blades and a simplified method of contact calculation of mortise and tenon joints are proposed, which can improve computational efficiency without affecting the accuracy of calculation. This method is used to analyze the deformation of a typical high-pressure turbine rotor. The results are compared with the deformation analysis results of a complex air-cooled blade model and contact analysis method. The results show that the relative error of the maximum radial deformation of the turbine blade tip is 0.47%, and the reduction of the computer time is 99%. The simplified method and the computational method are proved to be effective.