摘要
采用混合有限元-统计能量分析（FE-SEA）理论搭建某高速列车车厢的中频声学模型,考虑内饰件的声学性能,研究整备车厢的车内噪声.提出多物理场耦合激励下的高速列车车内结构辐射噪声计算方案,分别采用快速多极边界元、刚性多体动力学和大涡模拟结合Ffowcs Williams-Hawkings（FW-H）声类比法提取了350km/h下的轮轨噪声、二系悬挂力和空气动力噪声,将这些激励源耦合后作用在列车混合模型上,计算200~1 600 Hz内的车内噪声.在相同车速下,选取车内中心距离地板1.2m高度处的仿真与试验声压级进行对比,结果显示2条曲线的变化趋势基本一致,声压级总值相差2.7dB,误差符合工程要求,验证了列车中频声学耦合模型及多物理场耦合激励的精度.
Hybrid finite element-statistical energy analysis （FE-SEA） theory was employed to construct the medium-frequency acoustic model of a high-speed railway train coach. Acoustic attributes of trim parts were taken into consideration to study the interior noise of a fully-trimmed coach. The calculation scheme for the high-speed train interior structural radiated noise under multi-physical-field coupled excitations was proposed, which adopted fast multi-pole boundary element analysis, rigid multi-body dynamics, and large- eddy simulation integrated with Ffowcs Williams-Hawkings （FW-H） acoustic analogy method to extract the wheel-rail noise, secondary suspension forces, and aerodynamic noise at 350 km/h. The excitations were coupled to stimulate the hybrid train model to calculate the interior noise in the frequency range of 200~1600 Hz. Finally, the simulated and measured sound pressure levels of an observation point which is 1.2 m above the interior center floor at the same speed were contrasted. The results indicate that the changing trends of two curves are generally consistent, and the deviation of the overall sound pressure level is 2.7 dB, which validates the accuracy of the hybrid model and coupled excitations in accordance with engineering permission.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第2期315-321,343,共8页
Journal of Zhejiang University：Engineering Science
基金
国家科技部"十二五"863重大资助项目(2011AA11A103)
关键词
高速列车
中频噪声
混合FE-SEA法
多物理场耦合激励
快速多极边界元
high-speed railway train
medium-frequency noise
hybrid FE-SEA method
multi-physical-field coupled excitation
fast multi-pole boundary element analysis
