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学者姓名：徐普
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The deepwater J-lay pipeline exhibits pronounced dynamic responses in the touchdown zone (TDZ) compared to the S-lay pipeline. This paper demonstrates a refined numerical model built upon the vector form intrinsic finite element (VFIFE) method for the J-laying pipeline, employing the equivalent beam particle technique to discretize the pipeline into beam elements and particles. The model precisely captures stress-strain behaviors at the pipeline cross-section in the TDZ and enables a comprehensive analysis of static and dynamic responses. The simulation for a 12-inch diameter pipeline at a 1000 m laying depth is implemented and compared to the calculation from OrcaFlex with the consistent results. The stress and strain in the lower section are higher than those in the upper section, where peak stress and strain reach 177.95 MPa and 0.080%. Moreover, the internal force distribution in the TDZ is systematically analyzed under varying pipe diameters, submerged weights, and laying angles. Increasing the pipe diameter amplifies internal forces, while submerged weight primarily affects tension and bending moment. And raising the laying angle from 70 degrees to 85 degrees sharply increases peak stress and strain. The proposed model provides a precise tool for analyzing deepwater J-laying pipeline behaviors in the TDZ.
Keyword ：
Deepwater Deepwater J -laying operation J -laying operation Pipeline behavior Pipeline behavior Touchdown zone (TDZ) Touchdown zone (TDZ) Vector form intrinsic finite element (VFIFE) Vector form intrinsic finite element (VFIFE)
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| GB/T 7714 | Xu, Pu , Tan, Yinxin , Hu, Yiming et al. Precise simulation of deepwater J-laying pipeline in the TDZ by refined VFIFE method [J]. | OCEAN ENGINEERING , 2025 , 318 . |
| MLA | Xu, Pu et al. "Precise simulation of deepwater J-laying pipeline in the TDZ by refined VFIFE method" . | OCEAN ENGINEERING 318 (2025) . |
| APA | Xu, Pu , Tan, Yinxin , Hu, Yiming , Han, Bo . Precise simulation of deepwater J-laying pipeline in the TDZ by refined VFIFE method . | OCEAN ENGINEERING , 2025 , 318 . |
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The current evaluation models for earth-rock dam compaction quality seldom incorporate parameter uncertainty considerations. Additionally, the existing models frequently demonstrate constrained prediction accuracy and generalization capabilities. To resolve these issues, we present an intelligent evaluation method for the compaction quality of earth-rock dams that explicitly accounts for parameter uncertainty. The method utilizes a dynamic inertia weight, an adaptive factor, and a differential evolution strategy to enhance the search capability of the firefly algorithm. Furthermore, the random forest (RF) algorithm's Ntree and Mtry parameters are adaptively optimized through the improved firefly algorithm (IFA) to develop a dam compaction quality prediction model. This model aims to reveal the complex nonlinear mapping relationship between input influencing factors, such as compaction parameters, material source parameters, and meteorological factors, and the compaction quality. The proposed model improves the prediction accuracy, generalization ability, and robustness. The improved firefly optimization-based random forest (IFA-RF) is applied in practical engineering projects, and the results validate that this method can reliably and accurately predict the compaction quality of earth-rock dam construction in real time (R = 0.90107, MSE = 0.0000602, p = 0.000) and thereby guide remedial measures to ensure engineering safety and quality compliance.
Keyword ：
compaction quality compaction quality earth-rock dams earth-rock dams improved firefly optimization-based random forest improved firefly optimization-based random forest uncertainty uncertainty
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| GB/T 7714 | Lin, Weiwei , Yan, Yuling , Xu, Pu et al. Prediction Model for Compaction Quality of Earth-Rock Dams Based on IFA-RF Model [J]. | APPLIED SCIENCES-BASEL , 2025 , 15 (7) . |
| MLA | Lin, Weiwei et al. "Prediction Model for Compaction Quality of Earth-Rock Dams Based on IFA-RF Model" . | APPLIED SCIENCES-BASEL 15 . 7 (2025) . |
| APA | Lin, Weiwei , Yan, Yuling , Xu, Pu , Zhang, Xiao , Zhong, Yichuan . Prediction Model for Compaction Quality of Earth-Rock Dams Based on IFA-RF Model . | APPLIED SCIENCES-BASEL , 2025 , 15 (7) . |
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为高效利用海洋资源,促进多能源融合的新型浮式平台发展,提出一种适应深远海域的"风力机-光伏-网箱"浮式综合平台.基于FAST与AQWA耦合计算方法,建立风力机、光伏与网箱平台、系泊系统耦合数值计算模型,通过"光伏-网箱"组合模型与单一网箱模型的频域对比分析,探究光伏组件对综合平台水动力性能的影响,进一步考虑海洋环境风浪流联合作用,计算得到"风力机-光伏-网箱"浮式综合平台的动力响应.结果表明:光伏组件使组合模型附加质量和辐射阻尼峰值有一定增加,对一阶波浪力影响较小但会导致垂荡与纵摇方向的幅值响应算子(RAO)上升;风浪流联合作用下,上部风力机转子推力、叶尖挥舞偏移、塔基剪力和塔顶偏移均产生较大波动,下部光伏与网箱平台纵荡和纵摇方向响应幅值显著增加,对垂荡方向影响较小,但会引起平台迎风缆绳张力明显增大和背风缆绳张力相应减少;相比单一网箱平台,添加风力机、光伏组件同样会引起浮式综合平台迎风缆绳张力增加和背风缆绳张力减小.
Keyword ：
养殖网箱 养殖网箱 动力响应 动力响应 浮式发电站 浮式发电站 海上风力机 海上风力机 风浪流 风浪流
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| GB/T 7714 | 徐普 , 谌颖琪 , 宋启明 et al. 风浪流联合作用下"风力机-光伏-网箱"浮式综合平台动力响应分析 [J]. | 太阳能学报 , 2025 , 46 (3) : 626-634 . |
| MLA | 徐普 et al. "风浪流联合作用下"风力机-光伏-网箱"浮式综合平台动力响应分析" . | 太阳能学报 46 . 3 (2025) : 626-634 . |
| APA | 徐普 , 谌颖琪 , 宋启明 , 刘蔚 . 风浪流联合作用下"风力机-光伏-网箱"浮式综合平台动力响应分析 . | 太阳能学报 , 2025 , 46 (3) , 626-634 . |
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The pipe-in-pipe (PIP) system, with good structural resistance and favourable thermal insulation capacity, has been extensively applied in oil and natural gas exploitation in deep waters. In the present paper, a simplified equivalent numerical model of the PIP system for deepwater J-lay operation was developed to evaluate the dynamic response of the outer pipe and the inner pipe under the combined hydrodynamic load and pipelay vessel motion by the software OrcaFlex. The comparison of mechanical responses between the present equivalent model and other available PIP models was performed to verify its reasonability. Considering vessel motion, pipe-soil interaction, wave and current, the dynamic behaviour of the outer and inner pipes was evaluated on aspects of the bending moment, effective tension, equivalent stress and strain. After that, the influences of key geometric parameters on the dynamic behaviour of PIP systems were systematically studied, including the diameter-to-thickness ratios of the outer pipe and inner pipe as well as the core thickness. The findings would provide good guidance for the structural design and the installation analysis of PIP systems using the deepwater J-lay operation. © 2024 Elsevier Ltd
Keyword ：
Dynamic behaviour Dynamic behaviour Equivalent pipe Equivalent pipe J-lay J-lay Offshore pipeline Offshore pipeline Pipe-in-pipe system Pipe-in-pipe system
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| GB/T 7714 | Wang, X. , Yuan, L. , Xu, P. et al. Evaluation of dynamic behaviour of pipe-in-pipe systems for deepwater J-lay method [J]. | Applied Ocean Research , 2024 , 153 . |
| MLA | Wang, X. et al. "Evaluation of dynamic behaviour of pipe-in-pipe systems for deepwater J-lay method" . | Applied Ocean Research 153 (2024) . |
| APA | Wang, X. , Yuan, L. , Xu, P. , Ding, Z. , Wang, Y. , Gong, S. . Evaluation of dynamic behaviour of pipe-in-pipe systems for deepwater J-lay method . | Applied Ocean Research , 2024 , 153 . |
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The deepwater S-lay pipeline maintains high tension, bending moment, and stress in the overbend section, exhibiting substantially dynamic responses due to pipe-stinger roller interactions. This paper presents a refined Slay pipeline model capable of accurately describing the forces and deformations on the pipeline section. In this model, the pipeline is discretized into beam particles and beam elements using the vector form intrinsic finite element (VFIFE) method. Meanwhile, the equivalent beam particle technique is developed to account for both the local forces and deformations of the pipeline as well as its overall static and dynamic responses. Through program coding, a dynamic time-domain simulation was accomplished for a 12-inch pipeline being laid to a water depth of 1000 m to provide a detailed illustration of the S-lay modeling process. Furthermore, dynamic behaviours of the pipeline in the overbend were systematically investigated under various groups of the pipe diameter and the stinger roller spacing. The results indicate that the stress and deformation on the upper section of the pipeline are more significant than those on the lower section. The equivalent beam particle method extends the capabilities of the VFIFE for the detailed analyses of local dynamic behaviours of deepwater S-lay pipelines.
Keyword ：
Deepwater S -Lay Deepwater S -Lay Equivalent beam particle method Equivalent beam particle method Overbend section Overbend section Subsea pipeline Subsea pipeline Vector form intrinsic finite element (VFIFE) Vector form intrinsic finite element (VFIFE)
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| GB/T 7714 | Xu, Pu , Hu, Yiming , Wang, Xipeng et al. Refined VFIFE modeling on dynamic behaviours of deepwater S-lay pipeline in overbend section [J]. | OCEAN ENGINEERING , 2024 , 302 . |
| MLA | Xu, Pu et al. "Refined VFIFE modeling on dynamic behaviours of deepwater S-lay pipeline in overbend section" . | OCEAN ENGINEERING 302 (2024) . |
| APA | Xu, Pu , Hu, Yiming , Wang, Xipeng , Zheng, Jixiang , Han, Bo . Refined VFIFE modeling on dynamic behaviours of deepwater S-lay pipeline in overbend section . | OCEAN ENGINEERING , 2024 , 302 . |
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As the most adequate configuration, steel lazy wave risers (SLWRs) are developed for deep-sea oil and gas exploitation projects. However, SLWRs are very sensitive to ocean currents and internal solitary wave (ISW). Based on a 3D modified slender rod theory, a nonlinear dynamic model for the SLWR suffering from vessel motions (VMs), surface waves (SWs), ocean currents and ISW is established. According to the equivalence principle, equivalent parameters for the buoyancy section are introduced in the dynamic model. Besides, the applicability and formulas for different ISW theories are described. Finally, the nonlinear SLWR dynamic responses under four cases are compared to investigate the influence of the ISW and ocean currents. The results show that the ISW can significantly induce the oscillation displacements of the SLWR, especially along the horizontal direction near the ISW interface. The dynamic bending moments between the hang-off point and interface significantly intensify due to the ISW. The ISW affects the dynamic effective tension of the SLWR in the lower layer fluid more markedly than that in the upper layer fluid. In addition to the interface zone, the impact of ocean currents on the SLWR dynamic response seems to be more significant than that of the ISW.
Keyword ：
Internal solitary wave Internal solitary wave Ocean current Ocean current Slender rod theory Slender rod theory SLWR SLWR
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| GB/T 7714 | Ruan, Weidong , Chen, Miaoyi , Nie, Qinglin et al. Dynamic response of steel lazy wave riser considering the excitation of internal solitary wave and ocean currents [J]. | OCEAN ENGINEERING , 2024 , 294 . |
| MLA | Ruan, Weidong et al. "Dynamic response of steel lazy wave riser considering the excitation of internal solitary wave and ocean currents" . | OCEAN ENGINEERING 294 (2024) . |
| APA | Ruan, Weidong , Chen, Miaoyi , Nie, Qinglin , Xu, Pu , Li, Jiantao , Wang, Xuwei . Dynamic response of steel lazy wave riser considering the excitation of internal solitary wave and ocean currents . | OCEAN ENGINEERING , 2024 , 294 . |
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该文根据闽江流域历史观测资料，利用线性回归、Mann-Kendall趋势检验和Morlet小波分析等方法分析研究闽江流域水文要素时空变化特征及其演变规律。结果表明：1960-2022年，闽江流域降雨量无显著变化趋势，年降雨量和汛期降雨量的显著准周期具有高度同步性，均分别为29 a和7 a; 1973-2022年，闽江流域典型测站松溪站和清水壑站的汛期蒸发量和年蒸发量均呈现上升变化趋势，松溪站蒸发量上升趋势更显著，年蒸发量存在25 a和14 a的准周期变化，清水壑站年蒸发量存在28 a和13 a的准周期变化；1950-2022年，闽江下游控制测站竹岐站汛期平均径流量和年平均径流量均呈现下降变化趋势，前者存在17 a、6 a和3 a的准周期变化，后者存在18 a、13 a和6 a的准周期变化。研究结果可为闽江流域洪水管理和水资源调度提供数据支撑和科学依据。
Keyword ：
Mann-Kendall趋势检验 Mann-Kendall趋势检验 Morlet小波 Morlet小波 水文要素 水文要素 闽江流域 闽江流域
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| GB/T 7714 | 孙浩岩 , 贺茜 , 徐普 et al. 闽江流域水文要素时间序列特征分析 [J]. | 水利科技 , 2024 , PageCount-页数: 9 (02) : 1-9 . |
| MLA | 孙浩岩 et al. "闽江流域水文要素时间序列特征分析" . | 水利科技 PageCount-页数: 9 . 02 (2024) : 1-9 . |
| APA | 孙浩岩 , 贺茜 , 徐普 , 余志明 , 邹清水 . 闽江流域水文要素时间序列特征分析 . | 水利科技 , 2024 , PageCount-页数: 9 (02) , 1-9 . |
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The pipe-in-pipe (PIP) system, with good structural resistance and favourable thermal insulation capacity, has been extensively applied in oil and natural gas exploitation in deep waters. In the present paper, a simplified equivalent numerical model of the PIP system for deepwater J-lay operation was developed to evaluate the dynamic response of the outer pipe and the inner pipe under the combined hydrodynamic load and pipelay vessel motion by the software OrcaFlex. The comparison of mechanical responses between the present equivalent model and other available PIP models was performed to verify its reasonability. Considering vessel motion, pipe-soil interaction, wave and current, the dynamic behaviour of the outer and inner pipes was evaluated on aspects of the bending moment, effective tension, equivalent stress and strain. After that, the influences of key geometric parameters on the dynamic behaviour of PIP systems were systematically studied, including the diameter-to-thickness ratios of the outer pipe and inner pipe as well as the core thickness. The findings would provide good guidance for the structural design and the installation analysis of PIP systems using the deepwater J-lay operation.
Keyword ：
Dynamic behaviour Dynamic behaviour Equivalent pipe Equivalent pipe J -lay J -lay Offshore pipeline Offshore pipeline Pipe-in-pipe system Pipe-in-pipe system
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| GB/T 7714 | Wang, Xipeng , Yuan, Lin , Xu, Pu et al. Evaluation of dynamic behaviour of pipe-in-pipe systems for deepwater J-lay method [J]. | APPLIED OCEAN RESEARCH , 2024 , 153 . |
| MLA | Wang, Xipeng et al. "Evaluation of dynamic behaviour of pipe-in-pipe systems for deepwater J-lay method" . | APPLIED OCEAN RESEARCH 153 (2024) . |
| APA | Wang, Xipeng , Yuan, Lin , Xu, Pu , Ding, Zhi , Wang, Yingying , Gong, Shunfeng . Evaluation of dynamic behaviour of pipe-in-pipe systems for deepwater J-lay method . | APPLIED OCEAN RESEARCH , 2024 , 153 . |
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Floating photovoltaics (PVs) are progressively constructed in the ocean sea; therefore, the effect that freak waves have on their structural design needs to be considered. This paper developed a dedicated numerical model coupling the floating PV platform and mooring line structures to investigate their dynamic responses under freak waves. A feasible superposition approach is presented to generate freak wave sequences via the combination of transient waves and random waves. A large floating PV platform moored by twenty lines for a water depth of 45 m was designed in detail according to the actually measured ocean environmental and geological conditions. The global time domain analyses of the floating PV mooring structures were implemented to obtain dynamic responses, including PV platform motions and the mooring line configuration and tension under freak waves. A comparison of the response results with those caused by random waves was conducted to illustrate the intuitive evidence of the freak wave effects, which offer a significant reference for the preliminary design of the floating PV platform and mooring line structures.
Keyword ：
dynamic response dynamic response floating photovoltaic (PV) platform floating photovoltaic (PV) platform freak waves freak waves mooring line structure mooring line structure
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| GB/T 7714 | Xu, Pu , Zhang, Zirui , Li, Siliang et al. Numerical Investigation into the Dynamic Responses of Floating Photovoltaic Platform and Mooring Line Structures under Freak Waves [J]. | JOURNAL OF MARINE SCIENCE AND ENGINEERING , 2024 , 12 (1) . |
| MLA | Xu, Pu et al. "Numerical Investigation into the Dynamic Responses of Floating Photovoltaic Platform and Mooring Line Structures under Freak Waves" . | JOURNAL OF MARINE SCIENCE AND ENGINEERING 12 . 1 (2024) . |
| APA | Xu, Pu , Zhang, Zirui , Li, Siliang , Song, Qiming , Liu, Wei . Numerical Investigation into the Dynamic Responses of Floating Photovoltaic Platform and Mooring Line Structures under Freak Waves . | JOURNAL OF MARINE SCIENCE AND ENGINEERING , 2024 , 12 (1) . |
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Based on the new pile-plate bridge structure project of the coastal national highway in Fujian Province, the hydrodynamic experiments of the pile-plate bridge structure under the impact of plunging waves were conducted in the wave flume. The wave climbing height and the wave forces of the pile-plate bridge structure under the impact of three stages of plunging waves were investigated, and compared to those under the impact of regular waves. The influence laws of the incident wave height, wave period, and depth of the water on the wave climbing height and the wave force were analyzed. The results show that the hydrodynamic characteristics of the new pile-plate bridge structure impacted by the three stages of plunging waves are significantly different, there is evident wave climbing phenomenon in the about breaking and breaking stages, and the wave surface elevation after the climb of the plunging wave in the about breaking stage attains 1. 99 times of the regular wave; the horizontal wave force of the plunging wave at the about breaking stage is the strongest, which is 4. 48 times of the amplitude of the vertical wave force in the same stage, and can be 3.08 times of the horizontal wave force of the regular wave. The wave parameters and water depth significantly influence the hydrodynamic characteristics in three stages of plunging waves. With the increase of the incident wave height and water depth,the wave surface elevation and vertical wave force in the breaking stage exceed other stages. The increase of wave period makes the wave surface elevation in the complete breaking stage and the vertical wave force in the about breaking stage exceed those in the breaking stage. © 2024 Chinese Vibration Engineering Society. All rights reserved.
Keyword ：
Hydrodynamics Hydrodynamics Piles Piles Plates (structural components) Plates (structural components) Water waves Water waves
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| GB/T 7714 | Xu, Pu , Zhang, Shengyu , Zheng, Zhongkai et al. Experimental study on hydrodynamic characteristics of new pile-plate bridge structures impacted by plunging waves [J]. | Journal of Vibration and Shock , 2024 , 43 (7) : 355-364 . |
| MLA | Xu, Pu et al. "Experimental study on hydrodynamic characteristics of new pile-plate bridge structures impacted by plunging waves" . | Journal of Vibration and Shock 43 . 7 (2024) : 355-364 . |
| APA | Xu, Pu , Zhang, Shengyu , Zheng, Zhongkai , Liu, Qiujiang , Qui, Junfeng . Experimental study on hydrodynamic characteristics of new pile-plate bridge structures impacted by plunging waves . | Journal of Vibration and Shock , 2024 , 43 (7) , 355-364 . |
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