The Influence of Train Load Position on Panel Contribution to Acoustic Radiation of Viaduct Box-Beam in High Speed Railway
Box bridge is widely used in high-speed railway.At the same time, the bridge noise e mission has attracted more and more attention.The noise radiation of complex structure has always been viewed as one of the difficult problems in engineering application.In the structure of slab track in viaduct, the track plate and the box bridge are the important noise sources.In order to study the influence of high-speed train load position on the acoustic radiation characteristics of box bridge structure, the 32 m simply-supported box bridge is taken as an object.Using the finite ele ment-boundary element hybrid method, and combining with acoustic transfer vector, a vibration-a coustic coupled model of box-bridge in high speed railway can be developed to calculate the struc ture vibration response, the acoustic radiation of arbitrary acoustic field and the panel contribution to any field point.The results show that, at different frequencies, each panel contribution to field points is different.And it can be divided into positive, negative and neutral contribution.The panel noise contribution from vibration must be considered completely into frequency and excitation posi tion.For a field point, at the same frequency, the noise of bridge structure and each panel noise contributions are not very obvious under single train passing.When two trains pass by each other, the contribution of each plate achieve the maximum when the two trains not lie in the center of bridge at the same time.Both the contributions of each plate and the radiation sound pressures reach the minimum when two trains lie in the center line of bridge at the same time.
high-speed railway box bridge load position acoustic transfer vector acoustic radiation panel contribution
X.A.Zhang X.W.Yang G.T.Shi H.T.Sun
School of Mathematics, Physics and Software Engineering, Lanzhou Jiaotong University, Lanzhou, China Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shan School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou, China
国际会议
第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)
上海
英文
142-148
2013-11-08（万方平台首次上网日期，不代表论文的发表时间）