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由于颤振缩比模型与原模型在承力结构上存在差异,当二者的结构动力学特性相似时,气动弹性可能并不等效。针对该问题,提出了同时考虑结构动力学约束和颤振约束的颤振缩比模型优化设计方法,建立了利用遗传/敏度混合优化算法求解此问题的流程,研究了优化问题中目标函数和约束条件的选取方式,并以机翼颤振缩比模型为算例对方法的有效性进行了验证。研究表明,对于颤振缩比模型的设计,所提出的同时考虑结构动力学约束和颤振约束的优化设计方法,较之单独考虑结构动力学约束的优化方法具有更好的适用性。
Since the flutter-reduction ratio model is different from the original model in the bearing structure, the aeroelasticity may not be equivalent when the structural dynamics of the two models are similar. In order to solve this problem, an optimization design method of chatter-reduction model considering both structural dynamics constraints and flutter constraints is proposed. The flow of solving the problem using genetic / sensitivity hybrid optimization algorithm is established. The objective function and The selection method of the constraint conditions is also validated by the flutter reduction ratio model. The research shows that the proposed optimization design method considering both the structural dynamics and the flutter constraints has better applicability than the optimization method considering the structural dynamics constraints alone.