Applied Ocean Research最新文献_第2页

Large-scale experimental study on hydrodynamic performance of a permeable breakwater with prefabricated self-centering wave walls 预制自定心波壁透水防波堤水动力性能大型试验研究

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-22 DOI: 10.1016/j.apor.2026.104930

Yangchao Ru , Shimin Huang , Huanjun Jiang , Xu Zhao , Liusheng He

To facilitate rapid construction and improve the structural mechanical property and wave dissipation performance of breakwaters, a new type of permeable breakwater installed with prefabricated self-centering wave walls (SCWWs) is proposed in this study. A 1/5-scaled physical model is designed and tested in a large wave flume under regular waves to investigate wave force characteristics, structure response, as well as wave dissipation performance of the proposed breakwater. Experimental results show that the wave force and displacement responses of SCWWs exhibit periodic characteristics, with the positive wave force and positive rotation displacement under wave crest conditions being dominant. The proposed breakwater remains damage-free, and SCWWs can always return to the original position even under large wave heights thanks to self-centering capability. The experimental wave pressure distribution on SCWWs agrees well with the theoretical solutions. Wave forces acting on SCWWs increase obviously with relative wave height, while wave period has a limited influence. The proposed breakwater exhibits favorable wave dissipation performance, attributed to the energy dissipation function provided by the bottom horizontal platform, openings in SCWWs, and middle chamber. Parametric studies demonstrate that relative wave height and water depth significantly affect the transmission and reflection coefficients by promoting wave overtopping, and wave steepness enhances wave energy dissipation capacity.

为了便于快速施工，提高防波堤的结构力学性能和消波性能，本文提出了一种安装预制自定心防波堤的新型透水防波堤。设计了1/5比例物理模型，并在规则波浪作用下的大波浪水槽中进行了试验，研究了该防波堤的波浪力特性、结构响应和消波性能。实验结果表明，水轮机的波浪力和位移响应具有周期性，波峰条件下的正波浪力和正旋转位移占主导地位。该防波堤不受破坏，由于自定心能力，即使在大浪高下，SCWWs也能始终返回到原始位置。实验结果与理论结果吻合较好。作用在水轮机上的波浪力随相对波高的增加而明显增大，而波浪周期对水轮机的影响有限。本文提出的防波堤具有良好的消波性能，这主要归功于底部水平平台、组焊墙开孔和中间室的消能功能。参数化研究表明，相对波高和水深通过促进波浪过顶对透射和反射系数产生显著影响，波浪陡度增强了波浪的能量耗散能力。

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引用次数: 0

The impact of wave–current interaction on the dynamic response of a floating offshore wind turbine: A CFD investigation 波流相互作用对浮式海上风力机动力响应的影响：CFD研究

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-20 DOI: 10.1016/j.apor.2026.104928

Yiyong Dong , Weikai Tan , Kaiqing Luo , Yuzhu Pearl Li , Jing Yuan

Floating offshore wind turbines (FOWTs) are critical for deep-water renewable energy, but their dynamic response under combined wind, wave, and current conditions involves complex, nonlinear interactions that challenge accurate prediction. This study presents a high-fidelity computational fluid dynamics (CFD) model within the OpenFOAM framework, incorporating a new coupled wind–wave–current inlet boundary condition. The integrated numerical approach couples a multiphase flow solver (olaFlow), an actuator line model (ALM) for aerodynamics, a dynamic mooring model (MoorDyn), and a six-degree-of-freedom motion solver. Simulations under both normal and extreme conditions reveal that while the mean surge excitation force follows a linear superposition of individual environmental loads, the resulting mean displacement deviates significantly under large motions due to mooring system nonlinearity. In contrast, wave–current interaction (WCI) profoundly amplifies the wave-frequency surge response, with surge amplitudes increasing up to fourfold under normal conditions and doubling under extreme conditions. This amplification affects the overall platform motions and influences nacelle dynamics. As a result, it induces fluctuations in power output and thrust loading, undermining power generation stability and posing risks to blade safety and platform integrity. The study concludes that fully coupled simulations are essential for realistic FOWT design and assessment.

浮式海上风力涡轮机（FOWTs）对于深水可再生能源至关重要，但它们在风、波和电流条件下的动态响应涉及复杂的非线性相互作用，这对准确预测提出了挑战。本研究提出了一个在OpenFOAM框架内的高保真计算流体动力学（CFD）模型，其中包含了一个新的耦合风波-流入口边界条件。集成数值方法将多相流求解器（olaFlow）、空气动力学执行器线模型（ALM）、动态系泊模型（MoorDyn）和六自由度运动求解器耦合在一起。在正常和极端条件下的模拟表明，虽然平均激波激振力遵循单个环境载荷的线性叠加，但由于系泊系统的非线性，在大运动下产生的平均位移会显著偏离。相比之下，波流相互作用（WCI）极大地放大了波频浪涌响应，在正常条件下浪涌幅度增加了四倍，在极端条件下增加了一倍。这种放大会影响整个平台的运动和机舱动力学。导致输出功率和推力载荷波动，影响发电稳定性，对叶片安全和平台完整性构成威胁。研究结果表明，全耦合仿真对于实际的FOWT设计和评估至关重要。

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引用次数: 0

Towards adaptive collision energy standards for offshore jack-up legs: A structural failure mechanics perspective 海上自升式支撑腿自适应碰撞能量标准：结构破坏力学视角

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2025.104900

Myung-Su Yi , Dong-Hun Lee , Joo-Shin Park

Jack-up drilling rigs play are essential for offshore oil and gas exploration, with their leg structures subjects to significant static and dynamic loads. Increasing operational demands in deeper waters and harsher environments necessitate a structural integrity assessment, particularly under accidental impact scenarios. This study conducts an advanced nonlinear finite element (FE) analysis of jack-up rig leg collisions with offshore supply vessels using high-fidelity impact modeling, explicit dynamic simulations, and strain-rate-dependent plasticity models in LS-DYNA. The study evaluates collisions at various angles and energy levels, incorporating state-of-the-art material failure criteria, adaptive meshing techniques, and energy dissipation mechanisms. Results indicate that the current 35 MJ impact energy requirement specified by DNV may not be uniformly applicable to all structural members. Particularly, in brace collisions where local plastic deformation and stress redistribution significantly influence failure patterns. These findings emphasize the need for scenario-specific collision energy thresholds and potential reinforcement strategies to enhance jack-up rig survivability. This research contributes to the development of offshore structural resilience frameworks, providing valuable insights for classification societies, offshore engineering applications, and future digital twin-based predictive models for collision risk assessment.

自升式钻井平台在海上油气勘探中发挥着至关重要的作用，其支架结构承受着巨大的静态和动态载荷。在更深的水域和更恶劣的环境中，越来越多的作业要求需要进行结构完整性评估，特别是在意外撞击的情况下。本研究利用LS-DYNA中的高保真冲击建模、显式动态仿真和应变率相关塑性模型，对自升式钻井平台腿架与海上供应船的碰撞进行了先进的非线性有限元分析。该研究评估了不同角度和能量水平的碰撞，结合了最先进的材料失效标准、自适应网格技术和能量耗散机制。结果表明，DNV目前规定的35 MJ冲击能要求可能并不统一适用于所有结构构件。特别是在支撑碰撞中，局部塑性变形和应力重分布显著影响破坏模式。这些研究结果强调，需要制定特定场景的碰撞能量阈值和潜在的加固策略，以提高自升式钻井平台的生存能力。该研究有助于海上结构弹性框架的发展，为船级社、海上工程应用和未来基于数字孪生的碰撞风险评估预测模型提供有价值的见解。

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引用次数: 0

On the development of a numerical slamming tank to replicate quasi-two-dimensional experimental water impacts 模拟准二维水冲击实验的数值撞击槽的研制

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2025.104901

Connor Pearson , Nicola Shepherd , Mark Battley , Tom Allen

To better replicate in-service water impacts, experimental tests include several features to restrict flow and produce a quasi-two-dimensional environment. However, such experimental tests are large, complex, expensive to conduct, and the practicalities of real-world testing result in the introduction of three-dimensional flow behaviour, which is often not considered. This work presents the development of a numerical slamming tank to predict impact forces and pressure distributions of an experimental testing setup with artificially restricted flow, which has until now been treated as purely two-dimensional. The development of this model was informed by a review of the state-of-the-art modelling methodologies for water impacts, which indicates that a dynamic layering mesh technique is the most-promising for restricted flow environments. Results for the numerical slamming tank are compared against experimental measurements and purely two-dimensional analytical predictions of a 10

°

deadrise quasi-rigid panel at nominally constant impact velocities of 2.0 m/s, 4.0 m/s, and 6.0 m/s. Results confirm the significance of three-dimensional flow behaviour within experimental testing setups, with reductions of peak force and peak pressures of 95–115% and 39.4% respectively compared to purely two-dimensional predictions. This represents the first work that uses numerical methods to successfully reproduce and investigate the true three-dimensional flow behaviour present in real-world quasi-two-dimensional experimental tests. It is recommended that future works consider the effects of three-dimensional flow behaviour to properly validate and analyse the results any quasi-two-dimensional experimental tests.

为了更好地模拟使用中水的冲击，实验测试包括了几个限制流动的特征，并产生了准二维环境。然而，这样的实验测试规模大、复杂、成本高，而且实际测试的实用性导致了三维流动特性的引入，而这往往没有被考虑到。这项工作提出了一个数值撞击罐的发展，以预测人工限制流量的实验测试装置的冲击力和压力分布，到目前为止，这些都是纯二维的。该模型的开发是通过对最先进的水影响建模方法的回顾得出的，这表明动态分层网格技术是限制流动环境中最有前途的方法。在名义恒定的冲击速度为2.0 m/s、4.0 m/s和6.0 m/s的情况下，将数值撞击罐的结果与10°死角准刚性面板的实验测量结果和纯二维分析预测进行了比较。结果证实了三维流动特性在实验测试设置中的重要性，与纯二维预测相比，峰值力和峰值压力分别降低了95-115%和39.4%。这是第一次使用数值方法成功地再现和研究现实世界准二维实验测试中真实的三维流动行为。建议今后的工作考虑三维流动特性的影响，以适当地验证和分析任何准二维实验测试的结果。

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引用次数: 0

Physical modeling of a submerged floating tunnel with equivalent truncation 等效截断沉水浮式隧道的物理模拟

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2025.104909

Weidong Chen , Gancheng Zhu , Ping Dong , Pengzhi Lin , Bing Ren

This paper presents the experimental results of the dynamic response of a submerged floating tunnel (SFT) under wave action using a constrained truncated model. To achieve equivalence in dynamic behavior to that of the prototype SFT, the truncated model is fitted with specially designed mechanical devices which are used to adjust the horizontal, vertical, and rotational stiffnesses at the boundaries of the truncated model according to the numerical results of the prototype structure. In the experiments, the displacement and mooring tension of the model structure were measured under different incident wave conditions and boundary constraints. The results confirm that, compared to a free section, the constrained truncated section has a higher natural frequency. Its first-order horizontal natural frequency, f_S, and 2f_S, were 0.43 Hz and 0.86 Hz, respectively, both of which fall within the range of the incident wave frequencies in the experiment. As a result, both wave-frequency resonance and half-wave frequency instability were observed in the experiment. The amplitude of the half-wave frequency motion was significantly smaller than that under free boundary conditions. The analysis of mooring tension further revealed that under constrained boundary conditions, the phase difference of the mooring tensions between the mooring lines on both sides is significantly larger than that under free boundary conditions, and the tension amplitude also increased considerably. Additionally, under high wave height conditions, mooring cables experienced slack-taut process, with positive amplitudes reaching 3.2 and 2.8 times the initial tension for the seaward and leeward sides, respectively.

本文介绍了波浪作用下水下浮动隧道动力响应的约束截尾模型试验结果。为了使截断模型的动力性能与原型SFT等效，在截断模型上安装了专门设计的机械装置，根据原型结构的数值结果调整截断模型边界处的水平、垂直和旋转刚度。实验中，测量了模型结构在不同入射波条件和边界约束下的位移和系泊张力。结果表明，与自由截面相比，约束截短截面具有更高的固有频率。其一阶水平固有频率fS和2fS分别为0.43 Hz和0.86 Hz，均在实验中入射波频率范围内。结果表明，实验中出现了波频共振和半波频失稳现象。半波频率运动幅度明显小于自由边界条件下的运动幅度。对锚泊张力的分析进一步表明，在约束边界条件下，两侧锚泊线之间的锚泊张力相位差明显大于自由边界条件下的锚泊张力相位差，张力幅值也明显增大。此外，在高波高条件下，锚泊索经历了松弛张力过程，其正向振幅分别达到向海侧和背风侧初始张力的3.2倍和2.8倍。

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引用次数: 0

Lift force during deceleration of underwater slender body with various length-to-diameter ratios 不同长径比水下细长体减速时的升力

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2026.104919

Vitaliy Zemlyak , Alexandra Pogorelova , Victor Kozin

This study investigates the lift force dynamics on a slender body moving near a free water surface or an ice sheet. Combining experimental and theoretical approaches, the research examines two types of motion: uniform motion at constant velocity and deceleration from a given velocity to rest. The experiments were carried out a 14 m × 3 m × 1 m ice tank, with a freshwater ice cover formed under low air temperature conditions. Theoretically, the problem is solved within the framework of the linear wave theory, using the source-sink method for modeling the flow surface of a slender axisymmetric body. The influence of length-to-diameter ratios L/D = 6 – 14 and the slender body deceleration on the change in lift force depending on time, velocity, and ice plate thickness was investigated. The study also identifies the conditions under which the lift force reverses sign during deceleration, a phenomenon that can lead to a dangerous proximity to the ice surface.

本文研究了在自由水面或冰盖附近运动的细长物体的升力动力学。结合实验和理论方法，研究了两种类型的运动：匀速运动和从给定速度到静止的减速。实验在低温条件下形成淡水冰盖的14 m × 3 m × 1 m冰槽中进行。从理论上讲，该问题是在线性波动理论的框架内解决的，采用源汇法对细长轴对称体的流动表面进行建模。研究了长径比L/D = 6 ~ 14和细长体减速对升力随时间、速度和冰板厚度变化的影响。该研究还确定了在减速过程中升力反转的条件，这种现象可能导致危险的接近冰面。

引用次数: 0

Numerical study of vortex-induced vibration energy harvesting using a spinning cylinder 旋流筒涡激振动能量收集的数值研究

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2025.104914

Ashebir Dingeto Hailu , Ming-Jyh Chern , Desta Goytom Tewolde , Fandi D. Suprianto , Heng-Chuan Kan

A 3D LES turbulent flow model is utilized to explore the Vortex Induced Vibration (VIV) response of a spinning cylinder and wake structure interaction at a Reynolds number of 10,000. The objective of the study is to identify optimal parameters that maximize the energy harvesting efficiency of VIV of the rotating circular cylinder. Specifically, this study analyzes the influence of cylinder rotation, damping ratio, and mass damping parameter on the amplitude response. Key performance parameters, including amplitude response, hydrodynamic force coefficient, and energy harvesting efficiency, are analyzed to understand the influence of rotation on flow-induced motion. The analysis reveals that the spinning of the cylinder induces dominant vibrations around a negatively displaced equilibrium position. A higher damping ratio leads to a higher maximum efficiency of the vibrating spinning cylinder, whereas a small damping ratio results in larger amplitude responses but reduced efficiency. For energy-harvesting applications, the optimal damping ratio at a spin ratio of 2 is found to be 0.05. Moreover, the optimal spin ratio for energy harvesting lies within the range

1 \leq α \leq 2

. The energy harvesting efficiency increases with spin ratio, peaking at approximately 28.5% when

α = 2

, which represents an improvement of around 48.5% over the non-rotating case. However, for

α > 2

, the amplitude response is suppressed, making it inapplicable for energy harvesting. These findings highlight the potential of utilizing vibrating rotating circular systems to significantly improve the performance of clean energy harvesting.

利用三维LES湍流模型研究了1万雷诺数下旋转圆柱与尾迹结构相互作用的涡激振动响应。研究的目的是确定最优参数，使旋转圆柱的涡激振动能量收集效率最大化。具体来说，本研究分析了圆柱旋转、阻尼比和质量阻尼参数对振幅响应的影响。分析了关键性能参数，包括振幅响应、水动力系数和能量收集效率，以了解旋转对流致运动的影响。分析表明，圆柱的旋转在负位移平衡位置附近引起主导振动。阻尼比越高，振动纺丝筒的最大效率越高；阻尼比越小，振幅响应越大，效率越低。对于能量收集应用，发现自旋比为2时的最佳阻尼比为0.05。能量收集的最佳自旋比在1≤α≤2范围内。能量收集效率随着自旋比的增加而增加，当α=2时能量收集效率约为28.5%，比非旋转情况提高了48.5%左右。然而，对于α>；2，振幅响应被抑制，使其不适用于能量收集。这些发现突出了利用振动旋转圆形系统显著提高清洁能源收集性能的潜力。

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引用次数: 0

SPH-integrated chamber model applied to floating OWC devices: 2-D and 3-D analysis sph集成腔室模型在浮动OWC装置中的应用：二维和三维分析

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2025.104896

Beatrice Mina , Iván Martínez-Estévez , Bonaventura Tagliafierro , Alejandro J.C. Crespo , Moncho Gómez-Gesteira , Giovanni Malara , Felice Arena

In this work, we present the implementation and validation of an analytical chamber model, coupled to a single-phase Smoothed Particle Hydrodynamics (SPH) approach, to mimic the pneumatic power take-off (PTO) characterizing an Oscillating Water Column (OWC) wave energy converter. The power extraction mechanism of OWCs relies on the compression and decompression of an air pocket placed above a water column within the device chamber, which oscillates due to the incoming waves. A reliable PTO modeling is crucial in order to estimate and optimize the energy conversion performance of this kind of WECs. Usually, the pneumatic PTO is simulated via two-phase mesh-based techniques, which are quite effective when dealing with fixed OWCs. Whereas, meshless methods like SPH have proven their feasibility in modeling floating devices and free surface flows, but are less efficient when two phases (air and water) are involved, due to their higher computational cost. Hereby, instead, an alternative procedure that envisions the integration of an analytical chamber model within a single-phase SPH approach is carried out and implemented in the open source code DualSPHysics. In this paper, such a methodology is adopted and validated, against experiments, while replicating the behavior of a 2-D floating OWC and it is then employed to estimate the response of a 3-D floating OWC. A numerical power output study for the latter configuration is provided as well. To the authors knowledge, this work represents the first attempt at modeling the pneumatic PTO of floating OWC devices through an SPH technique.

在这项工作中，我们提出了一个分析室模型的实现和验证，结合单相光滑粒子流体动力学（SPH）方法，来模拟振荡水柱（OWC）波浪能量转换器的气动动力起飞（PTO）特征。OWCs的动力提取机制依赖于装置腔内水柱上方的气穴的压缩和减压，该气穴由于入射波而振荡。建立可靠的PTO模型是评估和优化这种新型新型焊接材料能量转换性能的关键。通常，气动PTO是通过基于两相网格的技术来模拟的，这种技术在处理固定的owc时非常有效。然而，像SPH这样的无网格方法已经证明了它们在模拟漂浮装置和自由表面流动方面的可行性，但当涉及两相（空气和水）时，由于其较高的计算成本，效率较低。因此，取而代之的是一个替代程序，该程序设想在单相SPH方法中集成分析室模型，并在开源代码dualspphysics中实现。在本文中，采用了这种方法，并通过实验验证了这种方法，同时复制了二维浮动OWC的行为，然后将其用于估计三维浮动OWC的响应。对后一种结构的功率输出进行了数值研究。据作者所知，这项工作代表了通过SPH技术对浮动OWC设备的气动PTO建模的第一次尝试。

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引用次数: 0

Physical modelling of the SeAbacus wave energy converter SeAbacus波浪能量转换器的物理模拟

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2025.104905

Barbara Zanuttigh, Paola Pareschi, Elisa Dallavalle, Sara Mizar Formentin, Maria Gabriella Gaeta

The SeAbacus is a new patent for a floating offshore wave attenuator, which essentially consists of a rafted Salter’s Duck. It is modular, suitable also for low-energy seas and for array installation. This paper presents the first physical model tests carried out in the wave tank at the Hydraulic Laboratory of the University of Bologna. The tests focused on the effects of the device shape (by changing the shape of the Salter’s Duck) and of the mooring layout (by testing a Tension Leg Platform, a Catenary Anchor Leg Mooring configuration and a spread mooring system) under wave attacks characterised by different wave height, wave steepness and wave obliquity. The results of the tests highlight the relevance of the shape of the Salter’s Duck and the capability of the device of producing wave energy also in mild seas, provided a moderate wave steepness. Wave obliquity significantly decreases the device pitch motion. The mooring layout affects the device motions because the more rigid the moorings the higher the device pitch due to combined motions of the raft and of the Salter’s Duck. The best compromise between device pitch motions and mooring loads was achieved with the spread mooring system.

SeAbacus是一项海上浮动波浪衰减器的新专利，它基本上由一个漂流的索尔特鸭组成。它是模块化的，也适用于低能源海洋和阵列安装。本文介绍了在博洛尼亚大学水力实验室波浪槽中进行的第一次物理模型试验。测试的重点是设备形状（通过改变Salter 's Duck的形状）和系泊布局（通过测试张力腿平台、悬链锚腿系泊配置和扩展系泊系统）在不同波高、波陡和波斜度的波浪攻击下的影响。测试结果强调了索尔特鸭的形状与该装置在温和海域产生波浪能的能力之间的相关性，前提是波浪陡度适中。波的倾角显著降低了器件的俯仰运动。系泊布局会影响设备的运动，因为系泊越刚性，由于筏和索尔特鸭的联合运动，设备的螺距就越高。扩展系泊系统实现了设备俯仰运动和系泊载荷之间的最佳折衷。

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引用次数: 0

Multi-scale simulation of pore structure and permeability of brittle coral gravel using X-ray computerized tomography and pore network modeling 基于x射线计算机断层扫描和孔隙网络模型的脆性珊瑚砾石孔隙结构和渗透率多尺度模拟

IF 4.4 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research

Pub Date : 2026-01-01 DOI: 10.1016/j.apor.2026.104924

Lei Yan , Xianwei Zhang , Xinyu Liu , Qingzhi Wang , Gang Wei , Xinming Li , Gang Wang

As a distinctive geotechnical material commonly found in coastal and island strata, coral gravel (CG) has irregular morphology and high porosity and susceptibility to breakage because of its biological origins and carbonate brittleness. These properties have significant influences on the mechanics and hydraulics of CG, but how its pore structure and permeability characteristics evolve during particle fragmentation is yet to be studied. This study uses X-ray computed tomography (X-CT) in combination with pore network modeling to develop a multi-scale analytical approach for the nondestructive dynamic simulation of particle breakage, investigating the morphological features, pore structure, and permeability of various types of CG. The multiscale analysis validates the classification of CG pores into three categories, i.e., intraparticle pores, blind pores, and through pores, and CG is found to have generally higher intraparticle porosity (about 5% on average) than calcareous sand. Also, the positive correlations between the permeability k and both the through porosity ɸ_t and the pore structure parameters (PSPs) of CG are established as k = 8.23 × 10^–12 × (ɸ_t)^0.57 and k = C ln (PSP) +D. A mechanism is proposed for how the pore structure evolves during particle breakage, focusing on changes in porosity and permeability. The X-CT-based multi-scale simulation method provides valuable insights into how microscopic pore structures influence the mechanical properties and fluid permeability of CG during particle fragmentation. These findings offer insights into the properties of CG in order to promote marine engineering construction.

珊瑚砾石（CG）是一种独特的岩土材料，常见于海岸和岛屿地层中，由于其生物成因和碳酸盐脆性，其形态不规则，孔隙率高，易破碎。这些性质对CG的力学和水力学有重要影响，但颗粒破碎过程中其孔隙结构和渗透率特征的变化规律仍有待研究。本研究利用x射线计算机断层扫描（X-CT）结合孔隙网络建模，建立了一种多尺度的无损动态模拟颗粒破碎的分析方法，研究了不同类型CG的形态特征、孔隙结构和渗透率。通过多尺度分析，将CG孔隙划分为颗粒内孔隙、盲孔和透孔三大类，发现CG的颗粒内孔隙度普遍高于钙质砂，平均约为5%。建立了渗透率k与孔隙度h t及孔隙结构参数（PSPs）的正相关关系：k = 8.23 × 10-12 × （h t）0.57, k = C ln (PSP) +D。提出了颗粒破碎过程中孔隙结构的演化机制，重点研究了孔隙度和渗透率的变化。基于x - ct的多尺度模拟方法为微观孔隙结构如何影响颗粒破碎过程中CG的力学性能和流体渗透率提供了有价值的见解。这些发现提供了对CG特性的深入了解，以促进海洋工程建设。

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引用次数: 0