Thin-wall structure large-deformation collision topological optimization method based on equivalent linear static load

Abstract

The invention belongs to the technical field of structural nonlinear dynamic response topological optimization design, and particularly relates to a thin-walled structure large-deformation collision topological optimization method based on an equivalent linear static load. The method comprises a structure collision analysis module, an equivalent linear static load calculation module, a structure linear static topological optimization module and a model updating module. Wherein an equivalent linear static load calculation method provided by the equivalent static load calculation module not only can realize free scaling according to the non-linear degree of a problem, but also can ensure that the used structure is always kept in a linear range; therefore, the problem that a standard equivalent static load method cannot be suitable for large-deformation collision topological optimization of the thin-wall structure is fundamentally solved, and a feasible technical scheme is provided for the crashworthiness and lightweight design of the thin-wall structure widely involved in automobile structure optimization design.

Description

technical field [0001] The invention belongs to the technical field of structural nonlinear dynamic response topology optimization design, and in particular relates to a large-deformation collision topology optimization method for thin-walled structures based on equivalent linear static loads. Background technique [0002] In recent years, with the continuous increase of car ownership, the safety, energy and environmental protection problems brought by cars have become prominent. The cars used to undertake people's daily travel have naturally attracted widespread attention. The pursuit of safety, energy saving and environmental protection is the eternal development of future cars. theme. [0003] Studies have shown that 43% of fatalities in traffic accidents can be reduced through crashworthy design of automobile structures, and every 10% weight reduction through lightweight design of automobile structures can reduce fuel consumption by 6%-8% and reduce exhaust emissions4 %...

AI Technical Summary

Problems solved by technology

Among them, the equivalent linear static load calculation method proposed by the equivalent static load calculation module can not only realize free scaling according to the nonlinear degree of the problem, but also ensure that the structural topology optimization it uses is always kept within the linear range, thus fundamentally solving the problem. The standard equivalent static load method cannot be applied to the problem of large deformation collision topology optimization of thin-walled structures, and thus provides a feasible technical solution for the crashworthiness and lightweight design of thin-walled structures widely involved in the optimal design of automobile structures

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