Analytical solution for calculating three-dimensional responses due to dynamic loads acting on an underwater tunnel in stratified soil

IF 5.3 1区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Chao He, Yanrui Liu, Shunhua Zhou, Yuanping Jia, Xiaohui Zhang
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引用次数: 0

Abstract

Hydroacoustic noise generated by trains running in underwater tunnels significantly impacts aquatic ecosystems, particularly fish breeding grounds and the habitats of endangered species. This underscores the necessity of investigating the characteristics of wave propagation and noise radiation emanating from underwater tunnels. This study proposes a novel analytical method for calculating 3D responses due to a dynamic point load acting on an underwater tunnel in stratified soils that considers dynamic tunnel–soil–fluid interactions. Stratified soils consist of multiple sediment layers, which are simulated as saturated porous media, overlying substrate layers, which are modeled as phase elastic media. The transfer matrix method is applied to simulate wave propagation in a layered fluid–solid system. The functions describing various types of waves scattered at the layer interfaces and the tunnel–soil interface are unified by wave transformation, thereby deriving an analytical solution for dynamic tunnel–soil–fluid interactions. A comparison with existing methods via numerical cases confirms the accuracy of the proposed method. Vibrations and hydroacoustic noise owing to dynamic loads acting on an underwater tunnel buried either in a saturated sediment layer or a single-phase substrate layer are investigated. The influences of tunnel burial depth, layering, as well as the porosity and permeability of saturated sediment are systematically analyzed. This research enhances the understanding of wave propagation and noise radiation in water emanating from underwater tunnels, facilitating the development of vibration isolation measures and protecting aquatic ecosystems.
层状土中水下隧道动荷载作用下三维响应的解析解
在水下隧道中运行的火车所产生的水声噪声对水生生态系统,特别是鱼类繁殖地和濒危物种的栖息地产生了重大影响。这就强调了研究水下隧道的波传播特性和噪声辐射特性的必要性。本研究提出了一种考虑隧道-土-流体动力相互作用的计算分层土中水下隧道动力点荷载三维响应的新分析方法。层状土由多个沉积层组成,其中沉积层被模拟为饱和多孔介质,其上的基材层被模拟为相弹性介质。采用传递矩阵法模拟了波在层状流固体系中的传播。通过波变换,将分散在层界面和隧道-土界面的各种波的函数统一起来,从而推导出隧道-土-流体动力相互作用的解析解。通过数值算例与现有方法的比较,验证了所提方法的准确性。研究了埋在饱和底泥层或单相衬底层中的水下隧道在动力载荷作用下的振动和水声噪声。系统分析了隧道埋深、分层以及饱和沉积物孔隙度和渗透率的影响。本研究增进了对水下隧道水的波传播和噪声辐射的认识,有助于制定隔振措施,保护水生生态系统。
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来源期刊
Computers and Geotechnics
Computers and Geotechnics 地学-地球科学综合
CiteScore
9.10
自引率
15.10%
发文量
438
审稿时长
45 days
期刊介绍: The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.
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