坝体-地基-库水系统的动力有限元分析及其应用  

Dynamic Finite Element Analysis of Dam-Foundation-Reservoir System and Its Application

作　　者：李艳朋 李建波[1,2] 林皋 LI Yanpeng;LI Jianbo;LIN Gao(State Key Lab of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China;Institute of Earthquake Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学海岸及近海工程国家重点实验室,辽宁大连116024 [2]大连理工大学建设工程学部水利工程学院工程抗震研究所,辽宁大连116024

出　　处：《水力发电》2021年第4期51-55,共5页Water Power

基　　金：国家重点研发计划项目(2016YFB0201003);中央高校基本科研业务费(DUT20TD209)。

摘　　要：基于有限元耦合声-结构方法(The coupled acoustic-structural method,CAS),结合阻抗边界条件,流体采用ABAQUS声学介质模拟,建立了有限元-无限元耦合的坝体-地基-库水系统的数值模型。该方法可对库底吸收边界条件、库水表面重力波和库尾辐射边界条件进行模拟。作为工程实例对满库Konya重力坝进行了分析,同时建立了附加质量-无质量地基模型作为对比。结果表明,附加质量模型算得的坝面动水压力分布明显偏大;附加质量-无质量地基模型的计算结果夸大了坝体动力响应。此外,该耦合模型计算效率较高,可对坝体-地基-库水系统进行更真实的仿真模拟。Based on the coupled acoustic-structural method(CAS)and the impedance boundary condition,the ABAQUS acoustic element is used to establish the finite-infinite elements coupling numerical model of the dam-foundation-reservoir system.The method can simulate the surface gravity wave,the reservoir bottom boundary condition and the radiation boundary condition of the reservoir tail conveniently.As an example of engineering application,the Konya gravity dam with full reservoir is analyzed,the model of additional mass and massless foundation is established as a comparison.The results show that the response of the dam-foundation-reservoir model is much lower than that of the additional mass-massless foundation model.At the same time,the calculation efficiency of the coupling model is high,which can simulate the dam-foundation-reservoir system more truly.

关 键 词：CAS 有限元-无限元 地震动输入 动水压力 附加质量 

分 类 号：TV312[水利工程—水工结构工程]