Automobile chassis part weight reduction method based on multi-body dynamics and topological optimization technology

Abstract

The invention provides an automobile chassis part weight reduction method based on multi-body dynamics and a topological optimization technology for the purpose of solving the problems that in existing automobile designs, a clear and feasible weight reduction method is unavailable, and an automobile chassis part still has a large weight reduction space. The automobile chassis part weight reduction method comprises the following steps: step 1, a finished automobile multi-body dynamic model and an object part finite element model of an object automobile type for weight reduction are established; step 2, multiple typical working conditions are selected, and an equivalent static load borne by an object part under each typical working condition is extracted; step 3, the equivalent static loads extracted in the step 2 are used as optimization boundary conditions, a flexibility weighting coefficient of each typical working condition is selected, the minimum total weighting flexibility serves as an objective function, and topological optimization is conducted with a constraint function including modality and stress; step 4, a threshold value is selected for a topological optimization result, and the position of a material to be removed is guided. The automobile chassis part weight reduction method based on the multi-body dynamics and the topological optimization technology combines a fatigue strength design with a static strength design, thereby having high reliability, portability and operability and being capable of effectively shortening the development cycle.

Description

technical field [0001] The present invention relates to the technical field of vehicle engineering and mechanical technology, in particular, it relates to a lightweight method for automobile chassis parts based on multi-body dynamics technology and topology optimization technology, which is especially suitable for use in the design and development stage or already in the Carry out the overall or partial lightweight optimization design of the chassis bearing parts of various types of automobiles, construction machinery and other products produced by the company. [0002] Background technique [0003] For a long time, my country's automobile design generally adopts experience and analogy methods, while foreign companies such as Europe, America and Japan have experienced gradual development, from extensive experience design and analogy design, through static strength and fatigue strength reliability design, to the current Lightweight design technology based on new materials and...

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