Modeling and simulation of high-frequency vibration of headrace tunnel in a pumped storage power station considering imperfect bounding condition

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-02-06 DOI:10.1016/j.tws.2025.113021

Xiuwei Yang , Jijian Lian , Haijun Wang , Xiaoqun Wang

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Abstract

High-frequency vibration (HFV) is a recently reported phenomenon in the headrace tunnel of pumped storage power stations (PSPS). These vibrations propagate through the upstream mountain, generating severe noise on the surface and disrupting the lives of local residents. In some cases, it may be necessary to relocate these residents, which increases the secondary costs associated with constructing PSPS. Therefore, modeling and predicting the vibration intensity of the headrace tunnel is crucial for the engineering design and stable operation of these facilities. In this study, a numerical model is developed to simulate the HFV response of the headrace tunnel, considering the interactions between the fluid, pipe, and surrounding rock. The interface between the pipe and surrounding rock is normally imperfectly bounded due to the existence of uneven surfaces, waterproof layers and interstices, and so on. The linear spring model is introduced to describe these imperfect characteristics. This study provides a strategy for determining the spring constants, which can be used to estimate the bonding degree between the pipe and the surrounding rock. The vibration response of the headrace tunnel is investigated based on the data from an actual PSPS, and the dominant vibration characteristics are analyzed.

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考虑不完善约束条件的抽水蓄能电站顶管隧道高频振动建模与仿真

高频振动是近年来抽水蓄能电站引水隧洞出现的一种现象。这些振动通过上游山脉传播，在地表产生严重的噪音，扰乱了当地居民的生活。在某些情况下，可能需要重新安置这些居民，这增加了与建造公共服务设施有关的次要费用。因此，对引水隧洞的振动强度进行建模和预测，对引水隧洞的工程设计和稳定运行至关重要。在本研究中，建立了考虑流体、管道和围岩相互作用的引水隧洞HFV响应的数值模型。由于存在不平整的表面、防水层和间隙等，管道与围岩的界面通常是不完全结合的。引入线性弹簧模型来描述这些不完美特性。该研究提供了一种确定弹簧常数的策略，可以用来估计管道与围岩的结合程度。基于某实际PSPS实测数据，对引水隧洞的振动响应进行了研究，分析了其主要振动特征。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.