Optimal Design of Structural Dynamic Boundary Conditions Based on Topology Optimization Method
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摘要: 对于处于恶劣振动环境中的工程结构,为了控制结构振动水平,需要准确地分析、预测结构的动力学特性,对结构进行动态设计。进行环境振动试验,需要试验夹具能够反映或模拟实际结构的动力学边界条件,是一个结构动力学边界设计问题。针对结构边界的动力学设计,开展在固有频率和振型要求下的结构边界动力学拓扑优化研究。数值算例采用的原型结构是一机翼刚架模型,通过对边界板进行拓扑优化,采用遗传算法来实现其优化过程。结果表明:基于结构的拓扑优化来模拟动力学边界条件是可行的。Abstract: To control the response of engineering structures working in severe vibrating environment,it is necessary to predict and analyze the dynamic characteristics of structures accurately and design the structures dynamically.In the environment vibration experiment,the dynamic boundary condition of the actual structure should be reflected or simulated by the test clamp,which is a design problem of structural dynamic boundary.For these situations,a new method based on topology optimization satisfying natural frequency and mode requirements was investigated.Genetic algorithm was used for topology optimization of boundary plate for a wing frame model as prototype structure.The results show that it is feasible to simulate structural dynamics boundary by topology optimization method.
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Key words:
- dynamic boundary /
- topology optimization /
- genetic algorithm
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