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| Effects of steel spring floating slab track on vibration and sound radiation of a box-girder |
| LI Xiaozhen, NIE Jun, GUO Zhen, WANG Dangxiong, ZHU Yan |
| Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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Abstract In order to study effects of steel spring floating slab track (SSFST) on vibration and sound radiation of a box-girder, a train-track coupled system model in frequency domain was established. The vibration analysis of a box-girder was performed using the finite element method, and its sound radiation analysis was done with the acoustic boundary element one. The established model was verified based on the field test data of a 30 m simply supported box-girder in an urban rail transit. Then, vibration and sound radiation characteristics of the box-girder adopting ordinary slab track and those using SSFST were compared, and the effect laws of SSFST parameters were explored. The results showed that the simulation results agree well with the test ones, vibration and sound radiation of the box-girder are concentrated within the frequency range of 50-125 Hz; compared with ordinary slab track, SSFST can reduce the overall vibration level of the box-girder bottom plate by 35.1 dB and its overall sound pressure level by 24 dB; steel spring stiffness is the main factor affecting the box-girder-s noise, followed by floating slab thickness, while effects of floating slab length and fastener stiffness are very small; steel spring stiffness is reduced by one time, the overall sound pressure level near the box-girder bottom plate can be reduced by 5-6 dB; floating slab thickness is increased by 0.1 m, noise reduction can be increased by 1-3 dB; the study results can provide a basis for parameter selection of steel spring floating slabs on a box-girder bridge.
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Received: 17 January 2018
Published: 28 June 2019
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[1] 刘林芽, 许代言. 腹板开孔的箱型梁结构噪声辐射特性分析[J]. 振动与冲击, 2016, 35(15): 204-210.
LIU Lin-ya, XU Dai-yan. Analysis of the structure noise radiation characteristics of box beam with web hole. Journal of Vibration and Shock, 2016, 35(15): 204-210.
[2] 张迅, 李小珍, 刘全民, 等. 混凝土箱梁的结构噪声及其影响因素[J]. 西南交通大学学报. 2013, 48(3): 409-414.
ZHANG Xun, LI Xiaozhen, LIU Quanmin, et al Structure-Borne noise of concrete box-girder and its influence factors. Journal of Vibration and Shock, 2013, 48(3): 409-414.
[3] Cui F, Chew C H. The effectiveness of floating slab track system, part I: receptance methods [J]. Applied Acoustics, 2000, 61: 441-453.
[4] Hussein MFM, Hunt HEM. Modelling of floating-slab tracks with continuous slabs under oscillating moving loads [J]. Journal of Sound and Vibration, 2006, 297(1-2): 37-54.
[5] Gupta S, Degrande G. Modelling of continuous and discontinuous floating slab tracks in a tunnel using a periodic approach [J]. Journal of Sound and Vibration, 2010, 329(8): 1101-1125.
[6] 李增光, 吴天行. 浮置板轨道动柔度计算方法及隔振性能研究[J]. 振动工程学报, 2007, 20(3): 207-212.
LI Zengguang, WU Tianxing. Study on the vibration isolation performance of floating slab track using dynamic receptance method [J]. Journal of Vibration Engineering, 2007, 20(3): 207-212.
[7] Li Z G, Wu T X. Modelling and analysis of force transmission in floating-slab track for railways [J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2008, 222(1): 45-57.
[8] 丁德云, 刘维宁, 李克飞, 等. 钢弹簧浮置板轨道参数研究[J]. 中国铁道科学, 2011, 32(1): 30-35.
DING Deyun, LIU Weining, LI Kefei, et al. Parametric study of the steel spring floating slab track [J]. China Railway Science, 2011, 32(1): 30-35.
[9] Lei X Y, Jiang C D. Analysis of vibration reduction effect of steel spring floating slab track with finite elements [J]. Journal of Vibration and Control, 2016, 22(6): 1462-1471.
[10] Saurenman H, Phillips J. In-service tests of the effectiveness of vibration control measures on the BART rail transit system [J]. Journal of Sound and Vibration, 2006, 293(3-5): 888-900.
[11] Hui C K, Ng C F. The effects of floating slab bending resonances on the vibration [J]. Applied Acoustics, 2009, 70: 830-844.
[12] 刘维宁, 丁德云, 李克飞, 等. 钢弹簧浮置板轨道低频特征试验研究[J]. 土木工程学报, 2011, 44(8): 118-125.
LIU Weining, DING Deyun, LI Kefei, et al. Experimental study of the low-frequency vibration characteristics of steel spring floating slab track [J]. China Civil Engineering Journal, 2011, 44(8): 118-125.
[13] 韦红亮, 练松良, 周宇. 高架钢弹簧浮置板轨道减振特性分析[J]. 同济大学学报(自然科学版), 2012, 40(9): 1342-1348.
WEI Hongliang, LIAN Songliang, ZHOU Yu. Vibration reduction characteristics of steel spring floating slab track in metro viaduct [J]. Journal of Tongji University(Natural Science), 2012, 40(9): 1342-1348.
[14] Dai F, Thompson D J, Zhu Y, et al. Vibration properties of slab track installed on a viaduct [J]. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2016, 230(1): 235–252.
[15] 王党雄, 李小珍, 张迅, 等. 轨道结构形式对箱梁中高频振动的影响研究[J]. 土木工程学报. 2017, 50(8): 68-77.
WANG Dangxiong, LI Xiaozhen, ZHANG Xun, et al. Study on the influence of different tracks on the medium- and high-frequency vibration of box-girder [J]. China Civil Engineering Journal, 2017, 50(8): 68-77.
[16] Zhang X, Li Xiaozhen, Hao Hong, et al. A case study of interior low-frequency noise from box-shaped bridge girders induced by running trains: its mechanism, prediction and countermeasures [J]. Journal of Sound and Vibration, 2016, 367: 129-144.
[17] 李增光，吴天行. 铁道车辆-轨道-高架桥耦合系统振动功率流分析[J]. 振动与冲击, 2010, 29(11): 78-82.
LI Zeng-guang, WU Tian-xing. Analysis of vibration power flow for a railway vehicle-track-viaduct coupled system [J]. Journal of Vibration and Shock, 2010, 29(11): 78-82.
[18] Wu T X, Thompson D J. Theoretical investigation of wheel/rail nonlinear interaction due to roughness excitation [J]. Vehicle System Dynamics, 2002, 37(3): 157-174.
[19] Wu T X, Thompson D J. Vibration analysis of railway track with multiple wheels on the rail [J]. Journal of Sound and Vibration, 2001, 239(1): 69-91.
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