Numerical Simulation of Mechanical Properties of Rectangular Shield Tail Assembly Stage
The tail of the shield is the weakest part of the shield shell.In practical engineering,the deformation of the shield tail caused by gravity often affects the assembly quality of the shield tail.Therefore,it is necessary to study the mechanical properties of the shield tail assembly stage.The article conducted a detailed numerical simulation of the quasi rectangular shield tail,studied the deformation and stress of the quasi rectangular shield tail during the assembly stage,and proposed 3 optimization schemes for shield tail design based on the deformation of the shield tail.The results indicate that the shield tail will undergo significant deformation during the assembly stage.In order to ensure that the shield tail remains close to the design dimensions even after deformation due to gravity and to ensure normal assembly,it is recommended to optimize the cross-sectional dimensions of the shield tail.After comprehensive comparison,it is believed that the best optimization solution is to expand the shield tail arch and the upper bending point outward,and retract the waist.
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