Abstract The blade deformation caused by aerodynamic and centrifugal loads during operating makes blade configurations different from their stationary shape. Based on the load incremental approach, a novel pre-deformation method for cold blade shape is provided in order to compensate blade deformation under running. Effect of nonlinear blade stiffness is considered by updating stiffness matrix in response to the variation of blade configuration when calculating deformations. The pre-deformation procedure is iterated till a converged cold blade shape is obtained. The proposed pre-deformation method is applied to a transonic compressor rotor. Effect of load conditions on blade pre-deformation is also analyzed. The results show that the pre-deformation method is easy to implement with fast convergence speed. Neither the aerodynamic load nor centrifugal load can be neglected in blade pre-deformation.

中文翻译：

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基于载荷增量法的制造压气机叶片预变形方法

摘要 运行过程中由空气动力和离心载荷引起的叶片变形使叶片构型与其静止形状不同。基于载荷增量法，提出了一种新颖的冷叶片形状预变形方法，以补偿叶片运行时的变形。在计算变形时，通过响应叶片配置的变化更新刚度矩阵来考虑非线性叶片刚度的影响。迭代预变形过程，直到获得收敛的冷刀片形状。所提出的预变形方法应用于跨音速压缩机转子。还分析了载荷条件对叶片预变形的影响。结果表明，该预变形方法易于实现，收敛速度快。