摘要
高速铁路行车密度大、运行速度高,列车高速行驶产生的瞬态交变气压会导致声屏障结构疲劳破坏,影响列车运行及沿线设施安全.本文以武广高铁上运行的某型号三节车厢列车为研究对象,建立与验证列车—声屏障三维流场仿真模型.通过确定流体力学理论模型、计算区域、网格划分和边界条件设置等对该模型进行流体动力学(CFD)分析,并利用330 km/h时速CRH系列某型列车进行流畅模型验证.同时,利用该模型分析不同空间位置处和不同通过车速下,声屏障表面的气动压力变化规律.结果表明,声屏障气动压力随列车速度增加呈现非线性增长,速度越大,气压波形跨度越小,近车侧声屏障所受风压先增大后减小;远车侧先减小后增大.本文结果可为声屏障优化设计和性能评估提供理论依据.
Due to the high traffic density and high operating speeds of high-speed railways,transient alternating air pressures generated by high-speed train operations can lead to structural fatigue and damage in sound barrier systems,thereby affecting train operations and the safety of facilities along the railway.This study focuses on a specific three-carriage train model operating on the Wuhan-Guangzhou high-speed railway line and establishes a three-dimensional flow field simulation model of the sound barriers in conjunction with the train.A computational fluid dynamics(CFD)analysis is conducted by determining the fluid mechanics model,computational domain,grid division,and boundary conditions.The simulation model is validated using the flow field data obtained from a CRH series train model at a speed of 330 km/h.The model is then utilized to analyze the aerodynamic pressure distribution characteristics on the surface of the sound barriers at different passing speeds,as well as the pressure variation patterns at different spatial locations.The results indicate that the aerodynamic pressure on the sound barriers exhibits nonlinear growth with increasing train speeds,with smaller pressure wave spans observed at higher speeds.The wind pressure on the sound barriers near the train initially increases and then decreases,while it decreases first and then increases on the far side of the train.The results of this paper can provide a theoretical basis or reference for optimizing the design and evaluation of the performance of sound barriers.
作者
杨波
杨偲婧
张港丽
胡玉杰
周伟
YANG Bo;YANG Caijing;ZHANG Gangli;HU Yujie;ZHOU Wei(CRRC Sifang Wuhan Railway Rail Transit Technology Co Ltd,Wuhan 430075,China;School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;CRRC Qingdao Sifang Co Ltd,Qingdao 266111,China)
出处
《五邑大学学报（自然科学版）》
CAS
2024年第4期50-57,共8页
Journal of Wuyi University(Natural Science Edition)
基金
中车青岛四方机车车辆股份有限公司资助项目(2022YFB4300601-008)。
作者简介
杨波(1989-),男,河南信阳人,工程师,学士,主要研究方向为高速动车组高级自主检修.
