面向超声速民机概念设计的气动/结构/声爆快速 优化方法

Existing multidisciplinary design analysis and optimization investigations on supersonic transport conceptual configurations generally fail to incorporate the coupled influence of structural layout, which restricts the in-depth exploration and overall improvement of the comprehensive performance of conceptual designs. To address this issue, an integrated rapid analysis and optimization method for aerodynamics, structures and sonic boom is proposed for supersonic civil aircraft to achieve collaborative performance improvement of multi-disciplinary layouts. The developed rapid analysis framework enables efficient prediction of lift-to-drag ratio, structural weight, stress, displacement and ground sonic boom intensity within 6 minutes, while taking the coupled effect between aerodynamic forces and structural characteristics into account. During optimization, design variables of aerodynamic shape and structural model are correlated on the basis of aircraft surface grid coordinates, which effectively reduces the redundancy of cross-disciplinary design variables. The proposed method is applied to the multidisciplinary optimization of the low-boom aircraft research model(LARM) . Results demonstrate that the optimized configuration features reduced wave drag, with the cruise lift-to-drag ratio increased by 3. 4%;structural utilization is enhanced, leading to a 4. 8% reduction in structural weight;and the far-field pressure waveform is mitigated, resulting in a 1. 1% decrease in ground sonic boom intensity. This research can provide methodological support and technical reference for the conceptual design of new-generation supersonic civil aircraft.