高速动车组气动外形多学科优化设计

Multidisciplinary Optimization Design of Aerodynamic Shape of High Speed EMU

基于流固耦合技术及阻力、升力、运行安全性与平稳性、气动噪声等多个性能指标驱动的多学科优化设计方法,兼顾各系统结构与功能,通过仿真分析和风洞试验等手段,系统研究了CRH3动车组气动外形与空气动力学、动力学、噪声等性能的耦合关系,对车辆间连接结构、转向架区域、车顶设备导流区域等部位进行了优化,提出了CRH380BL动车组的最佳气动外形方案,实现了预期设计目标.在线试验结果表明,CRH380BL动车组比CRH3动车组实测单位阻力降低7%,同时动车组运行稳定性提高、气动噪声有效降低,满足了持续运营速度350 km/h、最高运行速度380 km/h的技术要求.

Based on muhidisciplinary optimization design considering the performance indices such as FSI,resistance, lift, running safety and stability, aerodynamic noise, taking into account the system structure and function, the coupled relation of the aerodynamic shape, aerodynamics, dynamics and noise performance is studied systematically, and the connection structure between vehicles, the bogie area and roof area is optimized based on simulation and wind tunnel tests. The optimal aerodynamic shape of CRH380BL EMU is introduced to achieve the desired design goals. The results of line tests show that the actually measured unit resistance of CRH380BL EMU is decreased by 7% in comparison with CRH3 one, and the running stability is improved with effectively reduced aerodynamic noise to meet the technical requirements of sustained operation speed of 350 km/h and maximum operation speed of 380 km/h.