【摘要】：高架結(jié)構(gòu)在軌道交通中的比例愈來(lái)愈大,城軌橋梁振動(dòng)引起的噪聲輻射問(wèn)題也引起越來(lái)越多的關(guān)注。利用邊界元方法對(duì)槽型梁、箱型梁及T型梁3種不同截面形式的城軌橋梁的振動(dòng)噪聲輻射進(jìn)行分析,研究結(jié)果表明:在列車荷載作用下槽型梁的位移響應(yīng)最大,其次為箱型梁,T型梁的位移響應(yīng)最小;城軌橋梁下部場(chǎng)點(diǎn)的聲壓級(jí)普遍大于上部場(chǎng)點(diǎn)的聲壓級(jí);距離軌道中心線0~10 m范圍內(nèi),槽型梁的場(chǎng)點(diǎn)聲壓級(jí)最大,其次為T型梁,箱型梁的場(chǎng)點(diǎn)聲壓級(jí)最小;10~40 m范圍內(nèi)T型梁的場(chǎng)點(diǎn)聲壓級(jí)最大,其次為箱型梁,槽型梁的場(chǎng)點(diǎn)聲壓級(jí)最小;列車的運(yùn)行參數(shù)對(duì)結(jié)構(gòu)的振動(dòng)響應(yīng)和振動(dòng)噪聲輻射有顯著影響。
[Abstract]:The proportion of viaduct structure in rail transit is increasing, and the noise radiation caused by the vibration of urban rail bridge has attracted more and more attention. The vibration and noise radiation of three kinds of urban rail bridges with different sections of slot beam, box beam and T beam are analyzed by boundary element method. The results show that the displacement response of slot beam is the largest under train load, followed by box beam. The displacement response of T-shaped beam is the smallest. The sound pressure level of the lower field point of the urban rail bridge is generally larger than that of the upper field point. Within the range of 0 鈮，

本文編號(hào)：2490896