地震作用下海底悬跨管道水动力计算模型
|
摘要
在不同方向的地震动输入下海底悬跨管道的动力响应存在差别.基于Wake模型,提出了三维地震输入下的海底悬跨管道的水动力模型,并推导了有限元控制方程.建立有限元离散模型模拟模型试验工况,进行了正弦波和El Centro模拟地震波输入下海底悬跨管道的动力分析.通过数值计算和模型试验的结果比较可以看出,考虑地震动输入方向影响的Wake模型能够应用于海底悬跨管道的地震响应分析,其计算结果与试验结果符合得较好.
The earthquake input directions affect seismic response of free spanning submarine pipeline. A hydrodynamic force model improved from Wake model considering three dimensional excitation inputs is presented. Equations of motion are derived from the improved Wake model on the basis of finite element method. Finite element model is established to simulate the experimental conditions. The numerical results subjected to sine wave input and simulated El Centro earthquake input are obtained. The comparison of numerical and experimental results shows that the Wake model considering excitation directions could satisfactorily predict dynamic response of free spanning submarine pipelines under earthquake,and the numerical results are in agreement with the experimental ones.
The earthquake input directions affect seismic response of free spanning submarine pipeline. A hydrodynamic force model improved from Wake model considering three dimensional excitation inputs is presented. Equations of motion are derived from the improved Wake model on the basis of finite element method. Finite element model is established to simulate the experimental conditions. The numerical results subjected to sine wave input and simulated El Centro earthquake input are obtained. The comparison of numerical and experimental results shows that the Wake model considering excitation directions could satisfactorily predict dynamic response of free spanning submarine pipelines under earthquake,and the numerical results are in agreement with the experimental ones.
引文
[1]王金英,赵冬岩.渤海海底管道工程的现状、特点和问题[J].石油学报,1993,14(4):1-6
[2]DATTA T K,MASHALY E A.Transverse response of offshore pipelines to random ground motion[J].Earthquake Engineering and Structural Dynamics,1990,19(2):217-228
[3]KALLIONTZIS C.Numerical si mulation of submarine pipelines in dynamic contact with a moving seabed[J].Earthquake Engineering and Structural Dynamics,1998,27(5):465-486
[4]李昕,刘亚坤,周晶,等.海底悬跨管道动力反应的试验研究和数值模拟[J].工程力学,2003,20(2):21-25
[5]高学奎,朱[2].地震动水压力对深水桥墩的影响[J].北京交通大学学报,2006,30(1):54-58
[6]冯玉涛,戎进章,曹芳,等.动水及桩-土-结构相互作用对跨江大桥稳定性的地震影响分析[J].岩石力学与工程学报,2006,25(s1):3713-3718
[7]朱诗颂.丹江口水库二桥考虑水作用时的地震反应分析[J].武汉理工大学学报,2006,28(10):86-88
[8]LAMBRAKOS K F,CHAO J C,BECKMANN H,et al.Wake model of hydrodynamic forces on pipelines[J].Ocean Engineering,1987,14(2):117-136
[9]董汝博.多点地震动作用下海底悬跨管道非线性分析[D].大连:大连理工大学,2007
[10]WILSON E L.Three Di mensional Static and Dynamic Analysis of Structures:A Physical Approach with Emphasis on Earthquake Engineering[M].California:Computers and Structures Inc.,2002
[11]中国石油社.SY/T4804—92海底管道系统规范[S].北京:人民交通出版社,1992
[2]DATTA T K,MASHALY E A.Transverse response of offshore pipelines to random ground motion[J].Earthquake Engineering and Structural Dynamics,1990,19(2):217-228
[3]KALLIONTZIS C.Numerical si mulation of submarine pipelines in dynamic contact with a moving seabed[J].Earthquake Engineering and Structural Dynamics,1998,27(5):465-486
[4]李昕,刘亚坤,周晶,等.海底悬跨管道动力反应的试验研究和数值模拟[J].工程力学,2003,20(2):21-25
[5]高学奎,朱[2].地震动水压力对深水桥墩的影响[J].北京交通大学学报,2006,30(1):54-58
[6]冯玉涛,戎进章,曹芳,等.动水及桩-土-结构相互作用对跨江大桥稳定性的地震影响分析[J].岩石力学与工程学报,2006,25(s1):3713-3718
[7]朱诗颂.丹江口水库二桥考虑水作用时的地震反应分析[J].武汉理工大学学报,2006,28(10):86-88
[8]LAMBRAKOS K F,CHAO J C,BECKMANN H,et al.Wake model of hydrodynamic forces on pipelines[J].Ocean Engineering,1987,14(2):117-136
[9]董汝博.多点地震动作用下海底悬跨管道非线性分析[D].大连:大连理工大学,2007
[10]WILSON E L.Three Di mensional Static and Dynamic Analysis of Structures:A Physical Approach with Emphasis on Earthquake Engineering[M].California:Computers and Structures Inc.,2002
[11]中国石油社.SY/T4804—92海底管道系统规范[S].北京:人民交通出版社,1992
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心