论文部分内容阅读
针对传统结构动力学优化过程中求解效率较低的问题,以环形桁架可展天线结构参数优化为研究背景,在环形桁架可展天线结构的参数变量空间中,以试验设计方法选取样本点,通过有限元方法得到各个样本点的第一阶固有频率、固定载荷最大变形等响应值,利用样本点和响应值的关系建立Kriging近似模型进行优化算法的寻优,得到满足所有约束条件的最优解。结果表明,所得到的环形桁架可展天线第一阶固有频率、固定载荷最大变形的响应面呈现比较明显的非线性关系,基于Kriging模型的结构优化方法能比较准确地对环形桁架可展天线进行寻优设计。
In order to solve the problem of low efficiency in the optimization of traditional structural dynamics, taking the optimization of structural parameters of the ring truss deployable antenna as the research background, the sample points are selected by the experimental design method in the parametric variables space of the ring truss deployable antenna structure. Finite element method is used to get the first natural frequency and the maximum deformation of the fixed load. The Kriging approximation model is established by using the relationship between the sample point and the response value to optimize the optimization algorithm. The optimal solution that satisfies all the constraints is obtained . The results show that the response surface of the first natural frequency and the maximum deformation of the fixed load of the ring truss exhibits a rather nonlinear relationship, and the structure optimization method based on the Kriging model can be more accurate for the deployable antenna of the ring truss Optimum design.