Engineering Analysis with Boundary Elements最新文献_第3页

A coupled FDEM-CFD method for modelling heat exchange effectiveness in enhanced geothermal systems-excavation 模拟强化地热系统热交换效果的 FDEM-CFD 耦合方法--开挖

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-30 DOI: 10.1016/j.enganabound.2024.105980

{"title":"A coupled FDEM-CFD method for modelling heat exchange effectiveness in enhanced geothermal systems-excavation","authors":"","doi":"10.1016/j.enganabound.2024.105980","DOIUrl":"10.1016/j.enganabound.2024.105980","url":null,"abstract":"<div><div>Accurately assessing the impact of hydraulic fracturing technology on the heat exchange efficiency of Enhanced Geothermal Systems (EGS-E) is crucial. This paper proposes a coupled FDEM-CFD method to predict the heat exchange efficiency of EGS-E systems. Firstly, the FDEM method was adopted to establish a numerical model for EGS-E horizontal roadways. The physical process of fracture initiation, propagation, and the eventual formation of a coherent fracture network within intact rock mass were numerically studied. Subsequently, combined with CFD method, the flow and heat exchange processes between cold water and rock in horizontal roadway were investigated. The effects of hydraulic fracturing technology on the heat exchange efficiency of EGS-E project were comprehensively studied by comparing the water-rock heat exchange efficiency before and after fracturing. The results show that, hydraulic fracturing can increase the water-rock heat exchange area by 1385.5710 %, and the temperature difference between inlet and outlet increases by 8.3365 %. It shows that hydraulic fracturing improves the heat exchange efficiency of EGS-E.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimisation of open pit slope design considering groundwater effects using particle swarm optimisation and scaled boundary finite element method 利用粒子群优化和比例边界有限元法优化考虑地下水影响的露天矿边坡设计

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-27 DOI: 10.1016/j.enganabound.2024.105976

{"title":"Optimisation of open pit slope design considering groundwater effects using particle swarm optimisation and scaled boundary finite element method","authors":"","doi":"10.1016/j.enganabound.2024.105976","DOIUrl":"10.1016/j.enganabound.2024.105976","url":null,"abstract":"<div><div>Slopes are a crucial structures in open pit mines. Their design has implications on the economic, safety and environmental operation of the mining industry. Designing stable slopes can be challenging due to the complexities introduced by the stratigraphy and hydrology of the strata. With rising commodity costs and inflation rates, mining operating costs are increasing. Reducing operational costs is necessary for mining industries to remain competitive. While steepening the pit slope can decrease stripping materials and save money, it also increases the risk associated with slope surges. Therefore, optimising slopes is crucial for both financial and safety reasons. Numerical models such as the finite element method experience challenges in mesh generation of heterogeneous systems characterised by varying material properties and stratigraphies. Moreover, the need for repetitive geometry update necessitates recursive mesh regeneration that increases the computational burden. Moreover, previous slope optimisation studies focus solely on dry conditions. To consider the complex condition of hydrology along with heterogeneity in the soil stratigraphy, this study develops an optimisation procedure by combining the particle swarm optimisation algorithm and the scaled boundary finite element with an image-based meshing technique to optimise slopes with groundwater and achieve the desired factor of safety (FoS). The method changes the slope design parameters and the phreatic surface of groundwater simultaneously, considering user-defined parameters while iteratively re-meshing the optimisation processes. Several cases are presented, demonstrating the optimisation of bench width, bench angle, backfill parameters, and groundwater pumping levels.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142325870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel meshless numerical simulation of oil-water two-phase flow with gravity and capillary forces in three-dimensional porous media 三维多孔介质中带有重力和毛细力的油水两相流的新型无网格数值模拟

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-26 DOI: 10.1016/j.enganabound.2024.105975

引用次数: 0

Multi-dimensional modeling of solitary wave–structure interaction problems by using a δ-LES-SPH model 利用 δ-LES-SPH 模型对孤波-结构相互作用问题进行多维建模

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-25 DOI: 10.1016/j.enganabound.2024.105965

{"title":"Multi-dimensional modeling of solitary wave–structure interaction problems by using a δ-LES-SPH model","authors":"","doi":"10.1016/j.enganabound.2024.105965","DOIUrl":"10.1016/j.enganabound.2024.105965","url":null,"abstract":"<div><div>The interaction mechanisms between waves and marine structures are a popular research topic. This paper applies the weakly compressible smoothed particle hydrodynamics (WCSPH) method to study the dynamics of green water overtopping. To enhance the accuracy of the simulations, the SPH method coupled with the large eddy simulation (LES) model is employed for numerical investigations. Initially, we validate the effectiveness of the model by simulating the generation of solitary waves and irregular waves, as well as numerically reproducing the water surface morphology during the interaction between solitary waves and the deck. Subsequently, the validated model is used to study the dynamic characteristics of different types of waves overtopping, revealing significant variations in their motion. Furthermore, we investigate the effect of deck roughness during the entire green water overtopping process in terms of both protrusions extent and distribution, confirming that a reasonable setting of the protrusions can greatly reduce the wave impact loads on the deck, thereby protecting the structure. Additionally, a three-dimensional model is developed to study the green water problem, and we find that the turbulence phenomenon is more pronounced in the three-dimensional scenario.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A mesh-free method using Pascal polynomials for analyzing space-fractional PDEs in irregular biological geometries 利用帕斯卡多项式的无网格方法分析不规则生物几何中的空间分式 PDEs

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-25 DOI: 10.1016/j.enganabound.2024.105932

引用次数: 0

Nonlinear NMM analysis for large deformation and contact problems: Using full strain-rotation decomposition algorithm and augmented Lagrangian method enhanced open-closed iteration 大变形和接触问题的非线性 NMM 分析：使用全应变旋转分解算法和增强型拉格朗日法增强开闭迭代法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-25 DOI: 10.1016/j.enganabound.2024.105971

引用次数: 0

Kernel-based learning methods for stochastic partial differential equations 基于核的随机偏微分方程学习方法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-24 DOI: 10.1016/j.enganabound.2024.105960

引用次数: 0

Meta-heuristic optimization algorithms for vibration and buckling analysis of laminated composite plates 用于层压复合板振动和屈曲分析的元启发式优化算法

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-24 DOI: 10.1016/j.enganabound.2024.105974

{"title":"Meta-heuristic optimization algorithms for vibration and buckling analysis of laminated composite plates","authors":"","doi":"10.1016/j.enganabound.2024.105974","DOIUrl":"10.1016/j.enganabound.2024.105974","url":null,"abstract":"<div><div>The authors propose meta-heuristic optimization algorithms for the vibration and buckling analysis of laminated composite plates. This approach combines unified higher-order shear deformation theory, the Ritz method, and three optimization algorithms: the Shrimp and Goby Association Search Algorithm (SGA), Balancing Composite Motion Optimization (BCMO), and Differential Evolution (DE). The Ritz method, utilizing hybrid shape functions, is employed to solve optimization problems by using the Gram-Schmidt process to construct approximation functions. The SGA and BCMO are applied for the first time to determine the optimal buckling loads and frequencies of laminated composite plates. Numerical examples are provided to explore the influence of fiber angle, modulus ratio, and various boundary conditions on the optimal results. The findings demonstrate that BCMO and SGA are efficient and robust algorithms for addressing the optimization problems of laminated composite plates.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0955799724004478/pdfft?md5=135bab0003848eced5e3ea20ee88aca0&pid=1-s2.0-S0955799724004478-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D dynamic analysis in a 3D-FG cylindrical thick panel with two-dimensional nonlinear grading patterns using meshless local Petrov – Galerkin (MLPG) method 使用无网格局部彼得罗夫-加勒金（MLPG）方法对具有二维非线性级配模式的三维-FG 圆柱厚板进行三维动态分析

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-23 DOI: 10.1016/j.enganabound.2024.105964

引用次数: 0

Comparative study of face-based smoothed point interpolation method and linear finite element method for elastoplastic and large deformation problems in geomaterials 面基平滑点插值法与线性有限元法在土工材料弹塑性和大变形问题中的比较研究

IF 4.2 2区工程技术

Engineering Analysis with Boundary Elements Pub Date : 2024-09-21 DOI: 10.1016/j.enganabound.2024.105969

{"title":"Comparative study of face-based smoothed point interpolation method and linear finite element method for elastoplastic and large deformation problems in geomaterials","authors":"","doi":"10.1016/j.enganabound.2024.105969","DOIUrl":"10.1016/j.enganabound.2024.105969","url":null,"abstract":"<div><div>Nonlinear deformation of geomaterials is one of the important problems in geotechnical engineering. Compared with the finite element method (FEM), meshfree face-based smoothed point interpolation method (FSPIM) has a more exact stiffness and low mesh dependence, which shows great potential in simulating the nonlinear deformation of geomaterials. Compared with the linear FEM, this paper studies the calculation accuracy and efficiency of FSPIM with the T4 scheme for elastoplastic and large deformation problems in geomaterials. This paper first derives the elastoplastic and large deformation SPIM, including the smoothing deformation gradient, smoothing Green–Lagrange strain, the discrete updated Lagrangian governing equation, and elastoplastic constitutive relations that eliminate the effects of rigid body motion. Then, two effective analysis programs are developed for comparative analysis based on the FSPIM and linear FEM. Two classical slope models with different geometrical parameters and constitutive models are employed for numerical tests. Based on the numerical test results, the performance of FSPIM in the analysis of elastoplastic and large deformation problems in geomaterials is evaluated by comparing it with the linear FEM. Finally, the simulation results are discussed, and future work of the FSPIM is proposed.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0