Hybrid grid partitioning method of truck torsion bar type turnover mechanism finite element model

Abstract

The invention discloses a hybrid grid partitioning method of a truck torsion bar type turnover mechanism finite element model. The method comprises the steps that a geometric model of a truck torsion bar type turnover mechanism is constructed; grid partitioning software is utilized for carrying out geometric Boolean operation on the contact face between a torsion bar arm, a torsion bar shaft and a spherical hinge in the geometric model, so that the contact face between the torsion bar arm, the torsion bar shaft and the spherical hinge achieves node merging; the contact face of the torsion bar arm is expanded to form a transition area, and geometric cutting partitioning is carried out to obtain a transition area and a complex area; the torsion bar shaft and the spherical hinge are subjected to full hexahedron grid partitioning, pentahedron grid portioning is adopted for the transition area of the torsion bar arm, tetrahedral grid portioning is adopted for the complex area of the torsion bar arm, and hybrid grid portioning of the torsion bar type turnover mechanism is completed. The truck torsion bar type turnover mechanism can be subjected to fast finite element grid portioning, calculation precision is not influenced, meanwhile, pretreatment efficiency can be improved, the product development quality can be improved, time can be saved, and the human cost can be reduced.

Description

technical field [0001] The invention relates to a finite element model analysis technology of a torsion bar type turning mechanism of a truck, in particular to a mixed mesh division method of a finite element model of a torsion bar type turning mechanism of a truck. Background technique [0002] The truck torsion bar turning mechanism is a mechanism that uses the torsion moment of the torsion bar to overcome the gravity moment of the cab on the truck to realize the turning of the cab. 。 The torsion bar type turning mechanism of the truck comprises a torsion bar shaft, a torsion bar arm and a ball hinge, and a torsion bar arm is respectively provided at both ends of the torsion bar shaft, and a ball hinge is provided on each torsion bar arm. At present, the turning of most of the flat cabs of light trucks is realized by the torsion bar type turning mechanism. Compared with the hydraulic mechanism, the torsion bar mechanism has the characteristics of easy layout, light and fle...

AI Technical Summary

Problems solved by technology

When all tetrahedral grid units are used, the preprocessing time is short, and various complex structures can be easily completed, but the calculation accuracy is not high, and stress concentration is prone to occur in the main stress-bearing area; when all hexahedral grid units are used , it is difficult to realize all the hexahedral grid units, especially for complex structures, the structure is generally simplified first, and then it takes a long time and more energy to divide the hexahedral grid. Although the result of such division is relatively relatively convergent Easy, but consumes a lot of time and energy, and the simplification of some complex structural regions will also have some unknown effects on the calculation results

At present, the disadvantages of finite element meshing for torsion bar turning mechanism are: (1), the meshing method is single: it is difficult to use full tetrahedron or full hexahedral mesh elements to mesh torsion bar turning mechanism. has its obvious disadvantages

(2) The calculation result is not accurate enough: the calculation result of the flip mechanism divided by the full tetrahedral grid unit is not accurate enough, and when the hexahedral grid is used, the calculation structure will also be affected due to the excessive simplification of some geometry

(3) Time-consuming and energy-consuming: using full hexahedral mesh unit division will consume a lot of time and energy, reducing work efficiency

(4) Affect development efficiency: Existing methods will reduce the process of product development during the implementation process, affecting development efficiency and development quality

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