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为解决航空发动机套齿动态装配间隙的响应问题,在考虑动态变形和参数不确定性的情况下,将1种非概率区间分析方法与Kriging响应面模型及响应面优化方法相结合,对套齿初始装配间隙进行了可靠性优化设计。以某刚性套齿联轴器作为数值算例,在确定性设计的基础上,考虑机械载荷、热载荷、材料参数的分散性,运用区间分析方法得到了动态装配间隙的响应范围,利用非概率可靠性指标对初始装配间隙进行了优化设计。与确定性设计相比,优化设计提高了结构的可靠性;与概率设计相比,优化设计降低了对不确定参数的信息要求。验证了非概率方法解决装配对象不确定性结构响应问题的可行性与适用性。
In order to solve the problem of dynamic assembly clearance of aeroengine teeth, a non-probabilistic interval analysis method was combined with Kriging response surface model and response surface optimization method to consider the dynamic deformation and parameter uncertainty. Initial assembly clearance was optimized for reliability. Taking a rigid coupling gear as a numerical example, on the basis of deterministic design, considering the mechanical load, thermal load and the dispersion of material parameters, the response range of the dynamic assembly clearance is obtained by using the interval analysis method. By using the non-probability The reliability index optimizes the initial assembly clearance. Compared with deterministic design, the optimal design improves the reliability of the structure. Compared with the probabilistic design, the optimized design reduces the information requirements for the uncertain parameters. The feasibility and applicability of the non-probabilistic method to solve the structural response problem of the assembly object uncertainty are verified.