Anti-vibration structure dynamics optimization design method

Abstract

The invention relates to an anti-vibration structure dynamics optimization design method, which comprises the following steps of: 1, initializing a design model, and defining optimization parameters;2, carrying out damper-free engineering structure modal analysis; 3, performing optimal tuning of the damper; 4, performing structural harmonic response analysis and design sensitivity analysis of thedamper; and 5, engineering structure rib plate layout optimization based on a self-adaptive growth method. In the steps 2-5, the cycle is repeatedly optimized, the position and damping parameters ofthe damper and the rib plate layout of the structure are updated in each cycle, and the optimization program is ended until the iteration termination condition is met. The engineering structure and the damper are optimally designed at the same time, and the dynamic performance of the engineering structure is remarkably improved by considering the layout of rib plates of the engineering structure,the position of the damper and the interaction of damping parameters of the damper.

Description

technical field [0001] The invention relates to a dynamic design method of an anti-vibration structure, in particular to a simultaneous optimization design method for internal rib plate layout and tuned mass damper (abbreviated as damper hereinafter) of an engineering structure. Background technique [0002] Three-dimensional engineering structures with internal stiffeners are widely used in aerospace, shipbuilding, mechanical engineering, civil engineering and other fields. These structures are often subjected to vibrations caused by dynamic loads. How to improve their anti-vibration performance through structural optimization design is of great significance. The optimal design of rib plate layout (topology optimization) and rational arrangement of dampers are both effective anti-vibration design methods. These two methods can improve the dynamic performance of engineering structures from the perspectives of stiffness and damping, respectively. [0003] At present, the appl...

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Problems solved by technology

However, there is an obvious interaction between the two, that is, the layout of the ribs of the engineering structure will affect the optimal layout position and damping parameters of the damper, and the arrangement of the damper will also affect the layout of the ribs of the engineering structure.

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