Integrated optimization method of static strength, rigidity, stability of wallboard structure

Abstract

The invention discloses an integrated optimization method of static strength, rigidity, stability of a wallboard structure. In an optimization design process, apart from conventional static strength and rigidity, an integrated stability determination coefficient of the wallboard structure is introduced as a constraint condition, i.e., in an iteration process, automatic calculation and determination are performed on multiple instability modes including wallboard rib compression stability, pressing damage strength, compression stability of a skin diaphragm structure, cutting stability, integrated wallboard stability and the like, minimization of the total weight of the structure is taken as an object, dimension parameters of the wallboard structure are optimized, under the condition that the static strength, the rigidity and the integrated stability performance of the wallboard structure after the optimization satisfy design requirements, the weight of the structure is the lightest, recalculation on various stability of the structure after conventional engineering design and optimization is avoided, the problems of increased calculation cost and design change risks which are caused by using a conventional method are solved, and the design efficiency is substantially improved.

Description

technical field [0001] The invention relates to a method for optimizing a panel structure, in particular to a method for comprehensively optimizing the static strength, stiffness and stability of a panel structure, and belongs to the field of structural design. Background technique [0002] With the rapid development of aerospace technology, the performance requirements of aircraft are getting higher and higher. Traditional experience-based structural design ideas can no longer fully meet the design requirements of high-performance aircraft. The structural design ideas applied in this field have begun to optimize modern structures. design transfer. Modern structural optimization design is an innovative design idea in modern structural design technology. This method combines theories of modern computational mechanics, numerical analysis and mathematical programming, and uses computers with large storage capacity and high-speed processing capabilities as the design platform. S...

AI Technical Summary

Problems solved by technology

However, in the traditional optimization design, only the first type of design response of the structure can only be constrained, that is, in the process of optimization iterative calculation, only its direct static response (stress, strain, displacement) can be constrained , the optimization results are only limited to the static strength and stiffness of the structure meeting the design requirements, and it is necessary to check the various stability of the panel structure separately

First, because the calculation amount of stability check is much larger than that of static strength and stiffness check, the design efficiency is low; second, if the stability check does not meet the design requirements, the structure needs to be changed, and the static strength and stiffness still need to be recalculated. Optimization is useless work and loses the role of optimization. Such repetitions are actually artificial calculation iterations, and the design cost and cycle time are greatly increased.

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