Vibro-acoustic analysis of a rail transit continuous rigid frame box girder bridge based on a hybrid WFE-2D BE method

Song, Lizhong; Li, Xiaozhen; Zheng, Jing; Guo, Min; Wang, Xinxin

doi:10.1016/j.apacoust.2019.107028

Cited by 20 publications

(3 citation statements)

References 23 publications

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“…It is widely used in the fields of aerospace, aircraft, ship, railway vehicles, automobiles, machine tools, etc. [1][2][3][4], especially in the field of bridges [5,6]. In recent years, many scholars have widely studied the boxed girder structure design.…”

Section: Introductionmentioning

confidence: 99%

Box Girder Optimization by Orthogonal Experiment Design and GA-BP Algorithm in the Gondola Car Body

2021

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Box girder is an important bearing and force transmitting component in the gondola car body; the rationality of its structure directly affects the life of the whole car body. In order to solve disadvantage of the traditional box girder optimization method, which mainly depends on design experience, the combined method of orthogonal experimental design and the genetic algorithm-back propagation (GA-BP) algorithm is used for the structural optimization of bolster beam in this paper. Nine groups of parameters were established by orthogonal experiment, which can give typical samples for GA-BP optimization. Then, the bolster beam is optimized by the GA-BP algorithm, and the new gondola car body model is established with the optimized parameters. The finite element analysis results show that the minimum stress is found by using the GA-BP algorithm, which is basically consistent with the simulation results. Finally, the results show that the combined method of orthogonal experimental design and GA-BP algorithm is feasible to the box girder optimization of the gondola car body. Meanwhile, the optimization results of bolster beam will provide a reference for the structural design of the heavy haul wagon body.

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Section: Introductionmentioning

confidence: 99%

Box Girder Optimization by Orthogonal Experiment Design and GA-BP Algorithm in the Gondola Car Body

2021

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“…Recently, Li and Thompson [15] proposed a wavenumber-domain FE and BEM to predict rail and bridge vibro-acoustic responses. Song et al [16] used a hybrid waveguide FE and two-dimensional BEM to analyze a concrete continuous rigid-frame BG bridge. Song et al [17] used the same method to investigate the mediumand high-frequency vibration characteristics of a BG.…”

Section: Introductionmentioning

confidence: 99%

Vibro-acoustic performance of steel–concrete composite and prestressed concrete box girders subjected to train excitations

et al. 2021

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Owning to good mechanical properties, steel–concrete composite (SCC) and prestressed concrete (PC) box girders are the types of elevated structures used most in urban rail transit. However, their vibro-acoustic differences are yet to be explored in depth, while structure-radiated noise is becoming a main concern in noise-sensitive environments. In this work, numerical simulation is used to investigate the vibration and noise characteristics of both types of box girders induced by running trains, and the numerical procedure is verified with data measured from a PC box girder. The mechanism of vibration transmission and vibro-acoustic comparisons between SCC and PC box girders are investigated in detail, revealing that more vibration and noise arise from SCC box girders. The vibration differences between them are around 7.7 dB(A) at the bottom plate, 19.3 dB(A) at the web, and 6.7 dB(A) at the flange, while for structure-radiated noise, the difference is around 5.9 dB(A). Then, potential vibro-acoustic control strategies for SCC box girders are discussed. As the vibro-acoustic responses of two types of girders are dominated by the force transmitted to the bridge deck, track isolation is better than structural enhancement. It is shown that using a floating track slab can make the vibration and noise of an SCC box girder lower than those of a PC box girder. However, structural enhancement for the SCC box girder is extremely limited in effects. The six proposed structural enhancement measures reduce vibration by only 1.1–3.6 dB(A) and noise by up to 1.5 dB(A).

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“…Recently, Li and Thompson [7] used the 2.5D FEM-BEM method to evaluate the acoustic characteristics of a U-shaped concrete bridge by introducing a multilayer fastener model. Song et al [8] combined the wavenumber FEM and 2D BEM for the rapid prediction of bridge noise.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Vibration and Noise Characteristics of Urban Rail Transit Bridges with Box-Girder and U-Shaped Sections

Li¹,

Huang²,

Thompson³

2021

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Rolling noise and structure-borne noise from rail transit viaducts often lead to complaints from nearby residents. Concrete box section bridges are commonly adopted for the viaducts but those with U-shaped sections have become popular recently due to their more attractive form and reduced visual impact. One question that often arises in relation to the choice of the section types is their relative noise performance. This study aims to compare the vibration and noise characteristics of concrete bridges with different sections in a systematic way by using the same noise prediction method. A coupled track-bridge model is introduced to obtain the rail vibration and the power input to the bridge through the rail fasteners. A threedimensional vibro-acoustic finite element method is applied to obtain the noise radiated from the bridge and the rail subjected to sets of multiple forces acting on them. This is determined in terms of the radiation efficiency and sound pressure transfer functions for arbitrary forcing. The averaged mean squared vibration velocity of the coupled wheel-track-bridge model subjected to roughness excitation is used to scale the noise from the acoustic model. The method is validated by comparison with field measurements of noise from a U-shaped bridge in Shanghai.Comparative investigations are then conducted of the U-shaped bridge, a box girder bridge with 2 single cell and a twin-box girder bridge with two cells; each is fitted with equivalent noise barriers. It is found in each case that the noise from the rail is about 10 dB(A) larger than the bridge noise at positions to the side of the bridge. The U-shaped girder generally leads to slightly lower total noise levels than the box girders, with differences of less than 1 dB(A) when they have noise barriers of the same height. In terms of the bridge noise, however, the singlebox and twin-box girders produce an average of 8.6 and 11.7 dB(A) less noise than the Ushaped girder.

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Vibro-acoustic analysis of a rail transit continuous rigid frame box girder bridge based on a hybrid WFE-2D BE method

Cited by 20 publications

References 23 publications

Box Girder Optimization by Orthogonal Experiment Design and GA-BP Algorithm in the Gondola Car Body

Box Girder Optimization by Orthogonal Experiment Design and GA-BP Algorithm in the Gondola Car Body

Vibro-acoustic performance of steel–concrete composite and prestressed concrete box girders subjected to train excitations

Comparison of Vibration and Noise Characteristics of Urban Rail Transit Bridges with Box-Girder and U-Shaped Sections

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