CAJ | 학술논문

以高速铁路32 m 混凝土简支箱型桥梁为研究对象，通过有限元软件建立了轨道－桥梁分析模型，采用车辆－轨道－桥梁耦合振动理论，分析了桥梁结构的竖向振动，并将得到的竖向振动响应作为边界条件，导入到箱梁边界元模型中预测箱梁结构噪声。同时基于面板声学贡献分析理论，进行了箱梁梁体的面板声压贡献分析和声功率贡献分析，确定箱梁梁体辐射噪声的最大部位。研究结果表明：列车以200 km／h 的速度运行在高架轨道上时，箱梁梁体辐射噪声主要集中0－100 Hz 范围内，其中在20 Hz 和42 Hz 左右有比较突出峰值。同时由面板声学贡献分析可知箱梁梁体主要辐射噪声的部位是箱梁的顶板和两侧翼缘板下面板。
이고속철로32 m 혼응토간지상형교량위연구대상，통과유한원연건건립료궤도－교량분석모형，채용차량－궤도－교량우합진동이론，분석료교량결구적수향진동，병장득도적수향진동향응작위변계조건，도입도상량변계원모형중예측상량결구조성。동시기우면판성학공헌분석이론，진행료상량량체적면판성압공헌분석화성공솔공헌분석，학정상량량체복사조성적최대부위。연구결과표명：열차이200 km／h 적속도운행재고가궤도상시，상량량체복사조성주요집중0－100 Hz 범위내，기중재20 Hz 화42 Hz 좌우유비교돌출봉치。동시유면판성학공헌분석가지상량량체주요복사조성적부위시상량적정판화량측익연판하면판。
Taking the high speed railway 32 m concrete simply -supported box bridge as the research object,the theses used finite element software to set up for high speed railway track -bridge analysis model.Then,based on the theory of vehicle -track -bridge coupling vibration,this paper analyzed the vertical vibration of the struc-ture of the bridge.A vertical vibration response was finally gotten as boundary conditions,which we use in the boundary element model of box girder structure noise prediction.At the same time,based on panel acoustic con-tribution analysis theory,the box beam body panel pressure contribution analysis and panel acoustic power analy-sis were done.In this way,we determined the largest position of body radiation noise for box beam .The results of the study show that if the train speeds up to 200 km /h on the elevated rail,box beam body radiation noise mainly occur within the range of 0 -100 Hz,of which 20 Hz and 42 Hz are prominent peak.Meanwhile,by the panel acoustic contribution analysis,we come to the conclusion that the part of main radiation noise comes from the box girder roof and the two flank flange panel.