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学者姓名：徐普
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Abstract ：
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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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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Steel lazy-wave riser (SLWR) is one of the key technical components of offshore oil-gas production systems and is widely utilized in deepwater areas. On the basis of the vector form intrinsic finite element (VFIFE) method, this study develops a reasonable numerical model for the SLWR to investigate the effects of the buoyancy section on its mechanical characteristics. In the SLWR model, the buoyancy section is simulated using an equivalent riser segment with the same outer diameter and unit weight. The riser is considered to be composed of a series of space vector particles connected by elements, and virtual reverse motions are applied to establish the fundamental equations of forces and displacements. The explicit central difference technique is used to solve the governing equations for particle motion within the riser through programming implementation. To provide a detailed explanation of the process by which the SLWR achieves a stable lazy-wave configuration, a numerical model of a 2800-m-long riser is established at a water depth of 1600 m, and the feasibility of this model for riser behavior analysis is validated. The remarkable influences of the position, length, number and spacing of the buoyancy section on the mechanical behavior of the SLWR are observed, which provides a theoretical foundation for the optimal design of the SLWR in deepwaters.
Keyword ：
buoyancy section buoyancy section deepwater deepwater mechanical behavior mechanical behavior steel lazy-wave riser (SLWR) steel lazy-wave riser (SLWR) vector form intrinsic finite element (VFIFE) vector form intrinsic finite element (VFIFE)
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| GB/T 7714 | Xu, Pu , Hu, Yi-ming , Ruan, Wei-dong et al. Influence of the Buoyancy Section on the Mechanical Behavior of Deepwater Steel Lazy-Wave Risers [J]. | CHINA OCEAN ENGINEERING , 2025 , 39 (2) : 354-364 . |
| MLA | Xu, Pu et al. "Influence of the Buoyancy Section on the Mechanical Behavior of Deepwater Steel Lazy-Wave Risers" . | CHINA OCEAN ENGINEERING 39 . 2 (2025) : 354-364 . |
| APA | Xu, Pu , Hu, Yi-ming , Ruan, Wei-dong , Zheng, Ji-xiang , Javanmardi, Ahad . Influence of the Buoyancy Section on the Mechanical Behavior of Deepwater Steel Lazy-Wave Risers . | CHINA OCEAN ENGINEERING , 2025 , 39 (2) , 354-364 . |
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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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The deepwater pipelay finite element model often uses relatively small time steps for numerous iterative calculations to ensure sufficient precision, resulting in significant computational time consumption. In this paper, a novel numerical acceleration method is proposed, combining the vector form intrinsic finite element (VFIFE) method with GPU parallel techniques to address this issue. Efficient GPU computational solvers for static and dynamic analyses of deepwater J-lay and S-lay pipelines are developed by utilizing CUDA-based algorithms to handle key mechanical processes, including the calculation of pipeline internal forces and moments, top excitation, pipe-stinger roller interaction, hydrodynamic forces, and pipe-seabed soil interaction, etc. The method is applied to shell element, beam element, and refined beam element models, with coding strategies optimized for GPU parallel execution. Subsequently, localized pipeline solvers and global pipelay solvers are established to showcase the method's potential to significantly reduce computational time while maintaining accuracy. This study emphasizes the advantages of combining the VFIFE method with GPU parallel techniques and contributes efficient computational solvers for the mechanical analysis of deepwater pipeline laying.
Keyword ：
CUDA programming CUDA programming Deepwater installation Deepwater installation GPU parallel technique GPU parallel technique Offshore pipeline Offshore pipeline Vector form intrinsic finite element (VFIFE) Vector form intrinsic finite element (VFIFE)
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| GB/T 7714 | Xu, Pu , Zheng, Jixiang , Lin, Weiwei et al. Numerical acceleration method for static and dynamic analysis of deepwater laying pipelines [J]. | OCEAN ENGINEERING , 2025 , 338 . |
| MLA | Xu, Pu et al. "Numerical acceleration method for static and dynamic analysis of deepwater laying pipelines" . | OCEAN ENGINEERING 338 (2025) . |
| APA | Xu, Pu , Zheng, Jixiang , Lin, Weiwei , Hu, Yiming , Ye, Naiquan . Numerical acceleration method for static and dynamic analysis of deepwater laying pipelines . | OCEAN ENGINEERING , 2025 , 338 . |
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Ultra-high-performance concrete (UHPC) is renowned for its exceptional strength and durability, but the undesirable high material cost due to the considerable expense of reinforcing steel fiber hinders its wide application. The incorporation of more sustainable and light synthetic fibers presents a promising avenue for lowering the price and weight of UHPC while affecting the rheological and hardened behavior of UHPC. This paper conducts a comprehensive review of the key parameters of synthetic fibers, including content, aspect ratio, and surface properties, and their impacts on the fresh properties, mechanical performance, durability, and volume stability of UHPC. Particular emphasis is placed on the early and long-term performance of UHPC. Additionally, the sustainability of UHPC with various types of synthetic fibers is compared. By delving into these aspects, this study aims to furnish a constructive reference for engineers and decisionmakers regarding the utilization of synthetic fibers in UHPC to achieve optimal early and longterm performance.
Keyword ：
Ductility Ductility Durability Durability Sustainability Sustainability Synthetic fibers Synthetic fibers UHPC UHPC Volume stability Volume stability
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| GB/T 7714 | Yang, Zhengxian , Zheng, Zelong , Xu, Pu et al. Effect of synthetic fibers on early and long-term performance of UHPC: A review [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 101 . |
| MLA | Yang, Zhengxian et al. "Effect of synthetic fibers on early and long-term performance of UHPC: A review" . | JOURNAL OF BUILDING ENGINEERING 101 (2025) . |
| APA | Yang, Zhengxian , Zheng, Zelong , Xu, Pu , Ning, Pingping , Hu, Jie , Petrou, Michael F. et al. Effect of synthetic fibers on early and long-term performance of UHPC: A review . | JOURNAL OF BUILDING ENGINEERING , 2025 , 101 . |
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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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Integral buckle arrestors are regarded as the most effective arresting devices, which can provide an obstruction to a propagating buckle thereby protecting downstream pipelines. In the present study, numerical frameworks were established to reproduce the phenomenon of buckling propagating and crossing under hydrostatic pressure, and a strong consistency between measurements and predictions was achieved. The stress levels and deformation configurations of the assembly were carefully examined for two different failure modes. Then, broad parametric analyses on the crossover pressure were performed covering key material properties and geometries. After that, machine learning techniques were developed and used for predictions of failure modes, crossover pressure, and arresting efficiency, respectively. Four algorithms, including Random Forest, Multilayer Perceptron, K-Nearest Neighbors, and Support Vector Machine, were implemented using a dataset with seven variables. The prediction performance was evaluated by standard statistical metrics, and it was found that Multi-layer Perceptron model exhibited the better prediction accuracy for both classification and regression problems. Additionally, the existing experimental results were also used to verify the reliability of the machine learning model. The results demonstrate that the machine learning techniques can offer relatively accurate predictions for both flattening and flipping failure modes.
Keyword ：
Buckling failure Buckling failure External pressure External pressure Finite elements analysis Finite elements analysis Integral buckle arrestor Integral buckle arrestor Offshore pipeline Offshore pipeline Oil and gas engineering Oil and gas engineering Steel Steel
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| GB/T 7714 | Wang, Xipeng , Wang, Chuangyi , Yuan, Lin et al. Predictions of failure mode and arresting efficiency of integral buckle arrestors using FEM and machine learning methods [J]. | ENGINEERING FAILURE ANALYSIS , 2024 , 159 . |
| MLA | Wang, Xipeng et al. "Predictions of failure mode and arresting efficiency of integral buckle arrestors using FEM and machine learning methods" . | ENGINEERING FAILURE ANALYSIS 159 (2024) . |
| APA | Wang, Xipeng , Wang, Chuangyi , Yuan, Lin , Xu, Pu , Ding, Zhi . Predictions of failure mode and arresting efficiency of integral buckle arrestors using FEM and machine learning methods . | ENGINEERING FAILURE ANALYSIS , 2024 , 159 . |
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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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