【摘要】 为研究12 MN大型折弯机结构的强度和刚度，在SolidWorks中建立折弯机三维模型，通过ANSYS Workbench对其进行静力学分析。为验证有限元模型的准确性，采用电阻应变技术和激光位移传感器对折弯机进行测试试验。选取喉口加强筋的6个关键尺寸参数作为设计变量，以质量最小化为目标，对大型折弯机的墙板喉口结构尺寸进行参数化。采用中心组合设计生成45组样本点，构建Kriging响应面模型，通过局部灵敏度分析确定参数影响规律，并利用响应面分析法对折弯机墙板喉口大应力区域进行优化。结果表明：有限元模型与测试数据总体误差在11.27%以内；与优化前相比，折弯机墙板喉口最大应力由264.01 MPa减小至161.14 MPa,最大变形基本保持不变，墙板质量减少1 769 kg,减少了5.18%,保证了折弯机足够的强度和刚度，同时完成了结构的轻量化。更多还原

【Abstract】 To study the strength and stiffness of a 12 MN large-scale bending machine structure, a 3D model of the bending machine was established in SolidWorks, and its static analysis was carried out through ANSYS Workbench.To verify the accuracy of the finite element model, the bending machine was tested by using the resistance strain technology and the laser displacement sensor.Six key size parameters of the throat reinforcement ribs were selected as design variables.With the goal of minimizing the mass, the wall panel throat structure size of the large bending machine was parameterized.Forty-five groups of sample points were generated by using the central combination design to construct the Kriging response surface model.The influence law of parameters was determined through local sensitivity analysis, and the large stress area at the throat of the bending machine wall plate was optimized by using the response surface analysis method.The results indicate that the overall error between the finite element model and the test data is within 11.27%.Compared to the pre-optimization state, the maximum stress at the throat opening decrease from 264.01 MPa to 161.14 MPa, while the maximum deformation remain essentially unchanged.The mass of the side plates is decreased by 1 769 kg, a reduction of 5.18%.This optimization ensures the bending machine possesses sufficient strength and stiffness while achieving structural light-weighting.更多还原