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学者姓名：王丕光
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摘要 ：
针对水-轴对称柱体动力相互作用问题,提出了一种地震作用下水-结构相互作用的时域子结构分析方法。基于三维不可压缩水体的波动方程和边界条件,利用分离变量法将其转换为环向解析、竖向和径向数值的二维模型;基于比例边界有限元推导了截断边界处无限域水体的动力刚度方程,并将水体内域有限元方程和人工边界处的动水压力进行耦合,从而得到结构表面的动水压力方程;将轴对称柱体结构的有限元方程与动水压力方程耦合,从而得到水-轴对称柱体结构系统的时域有限元方程;数值算例验证该文提出的水-轴对称动力相互作用的子结构方法,结果表明:该文方法具有很高的精度和计算效率。通过对水中轴对称结构地震响应和自振频率的分析表明:地震动水压...
关键词 ：
地震 地震 水-轴对称结构相互作用 水-轴对称结构相互作用 有限元 有限元 比例边界有限元 比例边界有限元 轴对称柱体 轴对称柱体
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| GB/T 7714 | 王晓静 , 赵密 , 王丕光 et al. 地震作用下水-轴对称柱体相互作用的子结构分析方法 [J]. | 工程力学 , 2021 , 38 (02) : 27-35 . |
| MLA | 王晓静 et al. "地震作用下水-轴对称柱体相互作用的子结构分析方法" . | 工程力学 38 . 02 (2021) : 27-35 . |
| APA | 王晓静 , 赵密 , 王丕光 , 杜修力 , 程星磊 . 地震作用下水-轴对称柱体相互作用的子结构分析方法 . | 工程力学 , 2021 , 38 (02) , 27-35 . |
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摘要 ：
单桩式海上风力机整体化地震反应
关键词 ：
单桩式海上风机 单桩式海上风机 风-波浪统计关系 风-波浪统计关系 地震响应 地震响应 土-结相互作用 土-结相互作用 风-波浪-地震共同作用 风-波浪-地震共同作用
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| GB/T 7714 | 席仁强 , 杜修力 , 王丕光 et al. 单桩式海上风力机整体化地震反应 [J]. | 席仁强 , 2021 , 55 (4) : 757-766 . |
| MLA | 席仁强 et al. "单桩式海上风力机整体化地震反应" . | 席仁强 55 . 4 (2021) : 757-766 . |
| APA | 席仁强 , 杜修力 , 王丕光 , 许成顺 , 许坤 , 浙江大学学报:工学版 . 单桩式海上风力机整体化地震反应 . | 席仁强 , 2021 , 55 (4) , 757-766 . |
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摘要 ：
为了探讨风-波浪-地震共同作用下单桩式海上风机(OWTs)的动力行为,以National Renewable Energy Laboratory(NREL)5 MW风力发电机为研究对象,将风、地震作为独立事件,根据风-波浪统计关系确定波浪谱参数.改进FAST软件以模拟土-结相互作用,考虑停机、运行和应急停机3种工况,采用气动-伺服-水动-弹性耦合方法分析海上风机地震响应.算例表明,工作状态显著影响海上风机支撑结构的运动和内力,规律与地震强弱有关;地震动显著影响叶片挥舞振动速度;在风-波浪-地震的共同作用下,海上风机支撑结构危险截面剪力和弯矩峰值超过极端风-波浪作用效应.
关键词 ：
地震响应 地震响应 风-波浪统计关系 风-波浪统计关系 单桩式海上风机 单桩式海上风机 土-结相互作用 土-结相互作用 风-波浪-地震共同作用 风-波浪-地震共同作用
引用：
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| GB/T 7714 | 席仁强 , 杜修力 , 王丕光 et al. 单桩式海上风力机整体化地震反应 [J]. | 浙江大学学报(工学版) , 2021 , 55 (04) : 757-766 . |
| MLA | 席仁强 et al. "单桩式海上风力机整体化地震反应" . | 浙江大学学报(工学版) 55 . 04 (2021) : 757-766 . |
| APA | 席仁强 , 杜修力 , 王丕光 , 许成顺 , 许坤 . 单桩式海上风力机整体化地震反应 . | 浙江大学学报(工学版) , 2021 , 55 (04) , 757-766 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
系统自振频率限制是海上风机结构设计中的一个关键因素。运行状态下风机动力荷载会引起基础的水平侧移,较大的水平侧移会导致基础刚度的降低,进一步影响风机系统的自振频率。该文基于有限元软件ABAQUS平台,建立单桩式海上风机结构系统的自振频率数值模型,并讨论运行状态下基础水平侧移对大直径海上风机系统自振频率的影响。模型中考虑了塔筒的变截面特性;桩-土相互作用通过p-y曲线方法模拟;桩和塔采用梁单元模拟;通过Pushover分析汇总出水平侧移引起的桩顶水平刚度。研究结果表明:桩基侧向位移会降低风机结构体系的自振频率;桩基侧向位移对基频的影响较小,对高阶频率的影响显著;大直径海上风机的频率计算中可忽略风机...
关键词 ：
单桩基础 单桩基础 桩-土相互作用 桩-土相互作用 自振频率 自振频率 海上风机 海上风机
引用：
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| GB/T 7714 | 王丕光 , 刘晶波 , 赵密 . 运行状态下海上单桩风机系统自振频率分析 [J]. | 地震工程学报 , 2021 , 43 (03) : 704-709 . |
| MLA | 王丕光 et al. "运行状态下海上单桩风机系统自振频率分析" . | 地震工程学报 43 . 03 (2021) : 704-709 . |
| APA | 王丕光 , 刘晶波 , 赵密 . 运行状态下海上单桩风机系统自振频率分析 . | 地震工程学报 , 2021 , 43 (03) , 704-709 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
地震作用下水-轴对称柱体相互作用的子结构分析方法
关键词 ：
地震 地震 有限元 有限元 比例边界有限元 比例边界有限元 水-轴对称结构相互作用 水-轴对称结构相互作用 轴对称柱体 轴对称柱体
引用：
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| GB/T 7714 | 王晓静 , 赵密 , 王丕光 et al. 地震作用下水-轴对称柱体相互作用的子结构分析方法 [J]. | 王晓静 , 2021 , 38 (2) : 27-35 . |
| MLA | 王晓静 et al. "地震作用下水-轴对称柱体相互作用的子结构分析方法" . | 王晓静 38 . 2 (2021) : 27-35 . |
| APA | 王晓静 , 赵密 , 王丕光 , 杜修力 , 程星磊 , 工程力学 . 地震作用下水-轴对称柱体相互作用的子结构分析方法 . | 王晓静 , 2021 , 38 (2) , 27-35 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The bridges play an important transportation hub in the transportation lifeline system. The sea-crossing bridges located in earthquake-prone areas may be subjected to earthquake and wave action during their lifetime. This paper mainly investigates the seismic performance of continuous rigid frame bridges supported by group pile foundations based on the seismic fragility analysis. Based on the OpenSees software, the three-dimensional finite element model of the sea-crossing bridge is developed, where the pile-water interaction and pile-soil interaction are simulated by added mass method and p-y curve method, respectively. The uniform input ground motions are used by applying the displacement of the surface ground motion on all spring supports. Based on the traditional structural seismic vulnerability analysis and introducing the theory of reliability, the damage index is reduced by a half-trapezoidal distribution membership function, and the structural damage boundary is fuzzy analyzed to obtain the fuzzy components. Further, the damage limit about the vulnerability of the full bridge system is discussed. Finally, the influence of wave force on structural seismic vulnerability and the vulnerability of the full bridge model under different earthquake types, such as far-field, near-field pulse, and near-field non-pulse types, are analyzed.
关键词 ：
Combined earthquake and wave action Combined earthquake and wave action Fuzzy failure Fuzzy failure Pile-soil interaction Pile-soil interaction Sea-crossing bridge Sea-crossing bridge Seismic fragility Seismic fragility
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| GB/T 7714 | Zhang, Chao , Lu, Jianbin , Wang, Piguang et al. Seismic fragility analysis of sea-crossing continuous rigid frame bridges based on fuzzy failure [J]. | STRUCTURES , 2021 , 34 : 120-134 . |
| MLA | Zhang, Chao et al. "Seismic fragility analysis of sea-crossing continuous rigid frame bridges based on fuzzy failure" . | STRUCTURES 34 (2021) : 120-134 . |
| APA | Zhang, Chao , Lu, Jianbin , Wang, Piguang , Lai, Zhichao , Jia, Hongyu , Wu, Chengwang . Seismic fragility analysis of sea-crossing continuous rigid frame bridges based on fuzzy failure . | STRUCTURES , 2021 , 34 , 120-134 . |
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摘要 ：
The effect of hydrodynamic force on the seismic response of structure in water cannot be ignored. Various methods have been developed to describe the effect of incompressible water, but the relative performance of some practical simplified methods is largely unknown. In this paper a comprehensive comparison of three representative simplified methods for assessing cylindrical hydrodynamic force is presented. Relative errors of structural elastic peak responses are constructed to measure the accuracy of the simplified method. The errors are tested on 154 circular cylinders subjected to 100 ground motions. The errors were first obtained by averaging the results of ground motions. Then the comparison between methods and the influence of parameters were studied based on the mean errors. Furthermore, by analyzing the statistical characteristic values of the errors, the kernel density estimation method was adopted to obtain the probability density of the errors. Finally, the probabilities of cylindrical cases and methods were investigated. The results show that if the added mass of hydrodynamic force depends on more structural parameters, the accuracy of the method may higher. The rigid-structure method has the highest accuracy and the most complicated expression. The accuracy and complexity of the method based on approximation of fundamental frequency are moderate. The Morison method has the simplest form and the maximum error. The results indicate that the added mass should relate to several structural parameters, ignoring the change of the added mass along the height will bring error to method and assuming the structure to be rigid is an effective way to simplify the analytical hydrodynamics.
关键词 ：
Probability density Probability density Seismic response Seismic response Simplified method Simplified method Water-cylinder interaction Water-cylinder interaction
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| GB/T 7714 | Guo, Jie , Zhao, Mi , Wang, Piguang et al. Comparative assessment of simplified methods for hydrodynamic force on cylinder under earthquakes [J]. | OCEAN ENGINEERING , 2021 , 234 . |
| MLA | Guo, Jie et al. "Comparative assessment of simplified methods for hydrodynamic force on cylinder under earthquakes" . | OCEAN ENGINEERING 234 (2021) . |
| APA | Guo, Jie , Zhao, Mi , Wang, Piguang , Zhang, Nan . Comparative assessment of simplified methods for hydrodynamic force on cylinder under earthquakes . | OCEAN ENGINEERING , 2021 , 234 . |
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摘要 ：
The 5 MW wind turbine created by National Renewable Energy Laboratory (NREL) was taken as the prototype in order to analyze the dynamic behavior of monopile supported offshore wind turbines (OWTs) excited by the combination of wind, wave and earthquake. Then parameters of the wave spectrum were determined by the statistical relationship between wind and wave assuming that wind and earthquake were independent events. The FAST code was modified to simulate the soil-structure interaction, and the seismic response of OWTs was analyzed by using aero-servo-hydro-elastic coupled method. The running, park and emergency shutdown operational conditions were included. Results show that operational conditions significantly influence the deformations and internal forces of the support structure of wind turbines, and the principles are associated with the intensity of earthquakes. The oscillation velocity of the blade is considerably influenced by earthquakes. The amplitudes of shear and bending moment of critical section for the support structure may exceed those excited by extreme wind-wave under the combined excitation of wind, wave and seismic. Copyright ©2021 Journal of Zhejiang University (Engineering Science). All rights reserved.
关键词 ：
Earthquakes Earthquakes Ground supports Ground supports Offshore oil well production Offshore oil well production Offshore wind turbines Offshore wind turbines Seismic response Seismic response Shear flow Shear flow Soil structure interactions Soil structure interactions
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| GB/T 7714 | Xi, Ren-Qiang , Du, Xiu-Li , Wang, Pi-Guang et al. Integrated seismic response of monopile supported offshore wind turbines [J]. | Journal of Zhejiang University (Engineering Science) , 2021 , 55 (4) : 757-766 . |
| MLA | Xi, Ren-Qiang et al. "Integrated seismic response of monopile supported offshore wind turbines" . | Journal of Zhejiang University (Engineering Science) 55 . 4 (2021) : 757-766 . |
| APA | Xi, Ren-Qiang , Du, Xiu-Li , Wang, Pi-Guang , Xu, Cheng-Shun , Xu, Kun . Integrated seismic response of monopile supported offshore wind turbines . | Journal of Zhejiang University (Engineering Science) , 2021 , 55 (4) , 757-766 . |
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摘要 ：
The earthquake-induced pressures on arrays of cylinders have received less concern, although pile groups have been widely adopted in real practice. This paper develops an analytical method to investigate the interaction of water with arrays of rigid circular cylinders subjected to horizontal ground motion. According to seabed and surface boundary conditions and using the variable separation method, the three-dimensional governing equation of water is first transformed to a two-dimensional Helmholtz equation in the xy-plane and analytical vertical modes in z-direction. Then, the analytical solution of the hydrodynamic pressures on arrays of cylinders is deduced. This analytical solution includes the radiated wave pressures generated by each cylinder due to the ground motion, first-order scattered wave pressures due to the radiated waves, and high-order scattered wave pressure due to diffracted waves. The finite-element method is employed to validate the present analytical solution. The results show that the analytical solution agrees well with the numerical solution. The proposed method is finally used to investigate the earthquake-induced hydrodynamic forces on linear arrays of circular cylinders. (C) 2021 American Society of Civil Engineers.
关键词 ：
Analytical solution Analytical solution Arrays of circular cylinders Arrays of circular cylinders Earthquake Earthquake High-order scattered waves High-order scattered waves Hydrodynamic pressure Hydrodynamic pressure
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| GB/T 7714 | Wang, Piguang , Long, Pengzhen , Zhao, Mi et al. Analytical Solution of Earthquake-Induced Hydrodynamic Pressure on Arrays of Circular Cylinders Considering High-Order Scattered Waves [J]. | JOURNAL OF ENGINEERING MECHANICS , 2021 , 147 (9) . |
| MLA | Wang, Piguang et al. "Analytical Solution of Earthquake-Induced Hydrodynamic Pressure on Arrays of Circular Cylinders Considering High-Order Scattered Waves" . | JOURNAL OF ENGINEERING MECHANICS 147 . 9 (2021) . |
| APA | Wang, Piguang , Long, Pengzhen , Zhao, Mi , Zhang, Chao , Du, Xiuli . Analytical Solution of Earthquake-Induced Hydrodynamic Pressure on Arrays of Circular Cylinders Considering High-Order Scattered Waves . | JOURNAL OF ENGINEERING MECHANICS , 2021 , 147 (9) . |
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摘要 ：
An accurate and efficient substructure method in the time domain is developed to simulate pile-soil dynamic interaction during horizontal vibration. The present method considers the equilibrium of a linear elastic soil in both the radial and circumferential directions to account for three-dimensional wave scattering, and considers the end bearing pile as a one-dimensional rod. First, an analytical expression for the soil resistance to a horizontal vibration pile in the frequency-domain is obtained. From this, an exact dynamic stiffness relationship between the soil resistance and the pile displacement is constructed at the pile-soil interface. Further, the dynamic stiffness relationship in the frequency domain is transformed into a high-order approximation in the time domain. Then, this high-order approximation is equivalent to a mechanical model system consisting of mass, dashpot and spring elements. Finally, the effectiveness of the present method is verified and the effects of the dynamic stiffness of the soil on the dynamic responses of the pile are investigated.
关键词 ：
Finite element Finite element Pile-soil interaction Pile-soil interaction Rational function approximation Rational function approximation Soil resistance Soil resistance Substructure method in the time domain Substructure method in the time domain
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| GB/T 7714 | Wang, Piguang , Zhang, Wenqian , Xu, Haibin et al. A high-accuracy substructure method in the time domain for simulating pile-soil dynamic interaction in horizontal vibration [J]. | COMPUTERS AND GEOTECHNICS , 2021 , 140 . |
| MLA | Wang, Piguang et al. "A high-accuracy substructure method in the time domain for simulating pile-soil dynamic interaction in horizontal vibration" . | COMPUTERS AND GEOTECHNICS 140 (2021) . |
| APA | Wang, Piguang , Zhang, Wenqian , Xu, Haibin , Zhao, Mi , Du, Xiuli . A high-accuracy substructure method in the time domain for simulating pile-soil dynamic interaction in horizontal vibration . | COMPUTERS AND GEOTECHNICS , 2021 , 140 . |
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