基于组合代理模型的转向架构架多学科可靠性设计优化OA

To address the issue of operational safety for the bogie frame during service under the influence of multidisciplinary coupling and uncertain factors,a multidisciplinary reliability design optimization method based on ensemble surrogate models is proposed,aiming to improve solution efficiency while achieving disciplinary decoupling and performance enhancement.With mass as the system-level optimization objective and static strength,stiffness and vibration reliability as the subsystem-level optimization objectives,disciplinary decomposition is realized.A parametric model is established based on the APDL language,considering variable uncertainties.Sensitivity analysis and design of experiments are used to obtain the main design variables and their experimental samples for each discipline.An ensemble surrogate model is employed to perform response fitting on the disciplinary samples to improve accuracy,thereby conducting reliability analysis for each discipline.Combining reliability theory and collaborative optimization methods,a reliability-based multidisciplinary design optimization model of the bogie frame is constructed.Co-simulation using the Matlab and Isight platforms completes the model setup and solution,yielding an optimal design scheme that enhances the comprehensive performance of the bogie frame.