Fan blade maximum equivalent stress optimization method based on adjoint model

The invention relates to a fan blade maximum equivalent stress optimization method based on an adjoint model, and the method comprises the steps: obtaining an optimized fan blade stress design parameter through structural finite element and gradient optimization under the condition that an initial stress design parameter of a fan blade is known. According to the method, the fan blade stress optimization design efficiency and accuracy are improved, the method can be more conveniently used for machining and manufacturing, the design space is unified for the turbine multidisciplinary coupling optimization problem, and the problem that optimization fails due to the fact that the maximum equivalent stress of the fan blade is not miniaturized in the design space is solved. 本发明涉及一种基于伴随模型的风扇叶片最大等效应力优化方法，该方法在已知风扇叶片的初始应力设计参数的情况下，通过结构有限元和梯度优化，获取优化后的风扇叶片应力设计参数。本发明提高了风扇叶片应力优化设计效率和准确率，不仅更方便地用于加工制造，而且也为叶轮机多学科耦合优化问题统一了设计空间，也克服了由于风扇叶片最大等效应力在设计空间的不可微性导致优化失败的难题。