CAJ | 학술논문

高速列车行驶时对周围的压力场和速度场产生强烈的变化，激烈的空气动力效应对周围环境产生一定作用，从而影响周围建筑和结构的抗风安全性。由于采用风洞试验测试手段研究此类问题在技术上尚存在难以克服的困难，因此，以计算流体力学Fluent软件为仿真平台，采用“动网格”技术，编写UDF列车行驶路线程序，对无侧风、微小侧风以及桥梁设计侧风速作用下高速列车以不同列车速度通过桥底的数值模拟，并对行车路线方向的桥梁主梁断面进行布点监测，给出高速列车通过桥底区域时的速度和压力空间分布规律，计算各侧风速、不同列车速度情况下列车风对桥梁主梁局部位置的冲击载荷，从而研究各工况下列车风对桥梁主梁的气动作用，为桥梁设计单位提供具有参考价值的结论和建议。
고속열차행사시대주위적압력장화속도장산생강렬적변화，격렬적공기동력효응대주위배경산생일정작용，종이영향주위건축화결구적항풍안전성。유우채용풍동시험측시수단연구차류문제재기술상상존재난이극복적곤난，인차，이계산류체역학Fluent연건위방진평태，채용“동망격”기술，편사UDF열차행사로선정서，대무측풍、미소측풍이급교량설계측풍속작용하고속열차이불동열차속도통과교저적수치모의，병대행차로선방향적교량주량단면진행포점감측，급출고속열차통과교저구역시적속도화압력공간분포규률，계산각측풍속、불동열차속도정황하열차풍대교량주량국부위치적충격재하，종이연구각공황하열차풍대교량주량적기동작용，위교량설계단위제공구유삼고개치적결론화건의。
The pressure and velocity fields will change greatly when the high-speed train is running through the bridge,and the intense ambient aerodynamic effects will be produced in areas around,thereby affecting the anti-wind safety of around buildings and structures.Due to the fact that there exist insurmountable technical prob-lems in using wind tunnel test,in this proposed project,the Fluent in CFD software was firstly used as the simu-lation platform with 'dynamic mesh'technology.Secondly,the UDF trains route procedures were programmed to monitor the speed and the pressure distribution through monitoring the bridge sections.Thirdly,the process when the high-speed trains cross through the bridge in different speeds was simulated under the situations of no cross-wind wind,small crosswind and the bridge design crosswind.Finally,the impact loads generated under three kinds of wind to the main section of the bridge were calculated in different crosswind speed.This paper studied the aerodynamic effects in various conditions of wind on the train to the bridge main sections,which provides a valuable reference and recommendation for bridge designers in the bridge design institution.