基于正交试验的盾构机吊耳结构尺寸优化设计

Structural Dimension Optimization Design of the Shield Machine Lifting Lug Based on Orthogonal Test

吊耳是重型设备在吊运过程中重要的连接部件,盾构机盾体的吊运通常采用焊接吊耳,以具体吊运工程实例,结合吊耳设计的理论基础,初步确定了吊耳的结构尺寸与布置位置,然后使用有限元软件获得了吊运时盾体的应力、变形数值,确认所设计的吊耳满足相应的吊运安全。同时还建立了四因素、五水平的正交试验模型,探索了耳孔直径、耳孔圆角、筋板宽度和筋板到吊耳中心距离对吊耳受力的影响规律,最后对吊耳结构尺寸进行了优化选取,为今后吊耳的设计提供了参考价值。

Lugs are important connecting components of heavy lifting equipment,and the welding lug is mainly used for the lifting of shield machine at home and abroad.According to the specific examples of the lifting engineering,and combining with the theoretical basis of the lug design,the structural size and layout position of the lug are preliminarily determined.Then,the stress and deformation value of the shield body is obtained by using the finite element software,and the designed lifting lug is confirmed to meet the corresponding lifting safety.At the same time,the orthogonal design of four factors and five levels is established to explore the influences of the diameter of the ear hole,the rounded angle of the ear hole,the width of the rib plate and the distance from the rib plate to the center of the lifting lug on the forces of the lifting lugs.Finally,the structural size of the lifting lug is optimized,which provides reference value for the design of lifting lug in the future.