A recursive topology optimization method for the design of mortise and tenon joints

Abstract

The invention discloses a homing topology optimization method for the design of mortise and tenon joint structures, which specifically includes the following steps: step 1, establishing a finite element model of the structure to be optimized; step 2, selecting tenon groove (1), tenon (2) The area where the area is located is taken as the design domain; step 3, select the basic unit, and determine the basic structural form of the tenon (2) and tenon and groove (1); step 4, run a finite element analysis; step 5, calculate from step 4 The strain energy of the unit is filtered; Step 6, the basic unit and the augmented unit are augmented; Step 7, calculate the neighborhood state of each unit in the design domain; Step 8, set the local control parameters, and construct the local control rule; Step 9, Carry out convergence judgment; step 10, analysis and evaluation of optimization results. In this method, by changing the basic shape and form of the mutually matched and connected parts in the mortise and tenon connection structure, optimization can be carried out in a large range, and then the force transmission path of the mortise and tenon connection structure can be optimized.

Description

Technical field [0001] The present invention relates to a topological optimization method, particularly to a combination of assembled parts, butt parts, mortise and tenon structures or other structures that rely on the shape of the structure itself to support each other, position and transmit force optimization design method. Background [0002] With the development of engineering technology, thanks to the improvement of processing accuracy and the upgrading of assembly technology, combined, butt parts, etc. have been increasingly used in the design of connection parts of mechanical parts due to their high assembly efficiency and stable connection performance, such as mortise and tenon structures are not limited to the application of traditional wooden structures, but are adopted in a wider range of fields such as mechanical structure design and manufacturing. In this context, the optimization of this fast connection structure has important practical significance. [0003] At pr...

AI Technical Summary

Problems solved by technology

This method requires preset shape variables, and the direction and range of shape changes are limited, so that the optimization process depends too much on the topology and shape of the initial structure, and it is impossible to give inspiring new structural forms

Therefore, this method can only be used to improve stress concentration, optimize contact conditions, etc., but cannot change the force transmission path of the structure

[0004] Although topology optimization technology can give new structural forms with enlightening significance, conventional topology optimization technology, no matter variable density method, progressive structure optimization method, cellular automata method or level set method, can only be applied to a single flexible The optimization of the body is characterized by the fact that the boundary conditions of the structure are unchanged or only slightly and regularly change during the optimization iteration, so it cannot be applied to the situation where the boundary conditions change drastically in optimization problems such as tenon joint structures.

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