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Simulation of Underground Reservoir Stability of Pumped Storage Power Station Based on fluid-structure coupling

Computer Modeling in Engineering & Sciences 2024年第5期139卷 1381-1399页

作者： Peng Qiao Shuangshuang Lan Hongbiao Gu Zhengtan Mao Faculty of Architecture Civil and Transportation EngineeringBeijing University of TechnologyBeijing100020China College of Transportation Engineering Nanjing Tech UniversityNanjing210000China

Based on global initiatives such as the clean energy transition and the development of renewable energy,the pumped storage power station has become a new and significant way of energy storage and regulation,and its construction environment is more complex than that of a traditional *** particular,the stability of the rock strata in the underground reservoirs is affected by the seepage pressure and rock stress,which presents some challenges in achieving engineering safety and *** the advantages of the numerical simulation method in dealing deal with nonlinear problems in engineering stability,in this study,the stability of the underground reservoir of the Shidangshan(SDS)pumped storage power station was numerically calculated and quantitatively analyzed based on fluid-structure coupling theory,providing an important reference for the safe operation and management of the underground ***,using the COMSOL software,a suitablemechanicalmodel was created in accordance with the geological structure and project characteristics of the underground ***,the characteristics of the stress field,displacement field,and seepage field after excavation of the underground reservoir were simulated in light of the seepage effect of groundwater on the nearby rock of the underground ***,based on the construction specifications and Molar-Coulomb criterion,a thorough evaluation of the stability of the underground reservoir was performed through simulation of the filling and discharge conditions and anti-seepage strengthening *** findings demonstrate that the numerical simulation results have a certain level of reliability and are in accordance with the stress measured in the project *** underground reservoir excavation resulted in a maximum displacement value of the rock mass around the caverns of 3.56 mm in a typical section,and the safety coefficient of the parts,as determined using the Molar-Coulomb criterion,was highe

关键词： Underground reservoir fluid-structure coupling numerical simulation pumped storage power station filling and discharge

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Transverse seismic response of beam aque-duct considering fluid-structure coupling

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Acta Seismologica Sinica(English Edition) 2007年第3期20卷 348-355页

作者：季日臣夏修身陈尧隆王丽 School of Civil Engineering Lanzhou Jiaotong University School of Water Resource and Hydroelectric Engineering Xi'an University of Technolegy

Based on the theory of Housner, the transverse seismic response of beam aqueduct considering fluid-structure coupling is established. With the variation of aqueduct cross-section ratio of depth to width, the aqueduct transverse seismic response change. The transverse seismic response of a large-scale aqueduct in several work condition are calculated. It shows that the transverse seismic response is greatly influenced by the water mass in the aqueduct, but the shaking water play a TLD role. ff the whole water is appended aqueduct body, it will magnify seismic inertia action. When aqueduct cross-section is selected, the influence of ratio of depth and width to pier seismic response should be considered in order to reduce seismic action.

关键词： aqueduct fluid-structure coupling seismic response water model TLD action

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Application of CFD and FEA coupling to Predict Structural Dynamic Responses of A Trimaran in Uni-and Bi-Directional Waves

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China Ocean Engineering 2024年第1期38卷 81-92页

作者： LIAO Xi-yu XIA Jin-song CHEN Zhan-yang TANG Qin ZHAO Nan ZHAO Wei-dong GUI Hong-bin Marine Design&Research Institute of China Shanghai 200011China Ship structure Division China Ship Scientific Research CenterWuxi 214082China College of Ocean Engineering Harbin Institute of TechnologyWeihaiWeihai 264209China State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentDalian University of TechnologyDalian 116024China School of Foreign Studies Jiangnan UniversityWuxi 214122China

To predict the wave loads of a flexible trimaran in different wave fields,a one-way interaction numerical simulation method is proposed by integrating the fluid solver(Star-CCM+)and structural solver(Abaqus).Differing from the existing coupled CFD-FEA method for monohull ships in head waves,the presented method equates the mass and stiffness of the whole ship to the hull shell so that any transverse and longitudinal section stress of the hull in oblique waves can be ***,verification study and sensitivity analysis are carried out by comparing the trimaran motions using different mesh sizes and time step *** on the wave elevation of uni-and bi-directional waves is also carried *** a comprehensive analysis on the structural responses of the trimaran in different uni-directional regular wave and bi-directional cross sea conditions is carried out,***,the differences in structural response characteristics of trimaran in different wave fields are *** results show that the present method can reduce the computational burden of the two-way fluid-structure interaction simulations.

关键词： CFD-FEA fluid-structure coupling structural responses trimaran bi-directional cross sea

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Geometrically Nonlinear Flutter Analysis Based on CFD/CSD Methods and Wind Tunnel Experimental Verification

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1743-1758页

作者： Changrong Zhang Hongtao Guo Li Yu Binbin Lv Hongya Xia Institute of High Speed Aerodynamics China Aerodynamics Research and Development CenterMianyang621000China

This study presents a high-speed geometrically nonlinear flutter analysis calculation method based on the highprecision computational fluid dynamics/computational structural dynamics *** the proposed method,the aerodynamic simulation was conducted based on computational fluid dynamics,and the structural model was established using the nonlinear finite element model and tangential stiffness ***,the equilibrium position was obtained using the nonlinear static aeroelastic ***,the structural modal under a steady aerodynamic load was ***,the generalized displacement time curve was obtained by coupling the unsteady aerodynamics and linearized structure motion ***,if the flutter is not at a critical state,the incoming flow dynamic pressure needs to be changed,and the above steps must be repeated until the vibration amplitude are ***,the high-speed geometrically nonlinear flutter of the wing-body assemblymodel with a high-aspect ratio was investigated,and the correctness of the method was verified using high-speed wind tunnel *** results showed that the geometric nonlinearity of the large deformation of the wing caused in-plane bending to become a key factor in flutter characteristics and significantly decreased the dynamic pressure and frequency of the nonlinear flutter compared to those of the linear flutter.

关键词： fluid-structure coupling aeroelasticity flutter geometric nonlinearity numerical simulation

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Optimization of the Air Deck Blasting Parameters on the Basis of the Holmquist-Johnson-Cook Constitutive Model

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fluid Dynamics & Materials Processing 2022年第2期18卷 257-269页

作者： Zuoming Yin Xuguang Wang Desheng Wang Zhiheng Dang Jianfeng Shao School of Civil&Resource Engineering University of Science and Technology BeijingBeijingChina Beijing General Research Institute of Mining&Metallurgy BeijingChina MCC Construction Research Institute Co. Ltd.Beijing100082China

The present study considers the so-called air deck blasting,one of the most commonly used techniques for the improvement of blasting efficiency in mining *** particular,it aims to improve the operating conditions of large-scale equipment,increase the efficiency of the slope enlarging process,and reduce the mining *** objectives are implemented through a two-fold approach where,first,a program for slope enlarging based on the middle air-deck charge blasting-loosening technology is proposed,and second,the physical mechanism responsible for the stress wave attenuation in the rock is analyzed in the framework of a Holmquist–Johnson–Cook constitutive *** test results verify that the proposed approach is highly efficient and economical when used in medium-hard rock blasting and thus provides a basis for the practical implementation of slope enlargement for high benches in Open-Pit Mines.

关键词： Air deck blasting parameters holmquist-johnson-cook constitutive model fluid-structure coupling loosening blasting

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fluid-structure Coupled Analysis of the Transient Thermal Stress in an Exhaust Manifold

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fluid Dynamics & Materials Processing 2023年第11期19卷 2777-2790页

作者： Liang Yi Wen Gang Nenggui Pan Wangui Wang Shengshuai Mo College of Automotive Engineering Guilin University of Aerospace TechnologyGuilin541004China Passenger Vehicle Technology Center Dongfeng Liuzhou Automobile Co.Ltd.Liuzhou545005China

The development of thermal stress in the exhaust manifold of a gasoline engine is *** problem is addresses in the frame of a combined approach wherefluid and structure are coupled using the GT-POWER and STAR-CCM+***,the external characteristic curve of the engine is compared with a one-dimen-sional simulation model,then the parameters of the model are modified until the curve matches the available experimental ***-POWER is then used to transfer the inlet boundary data under transient conditions to STAR-CCM+in *** temperature profiles of the inner and outer walls of the exhaust manifold are obtained in this way,together with the thermal stress and thermal deformation of the exhaust manifold *** this information,the original model is improved through the addition of ***,the local branch pipes are optimized,leading to significant improvements in terms of thermal stress and thermal deforma-tion of the exhaust manifold(a 7%reduction in the maximum thermal stress).

关键词： Exhaust manifold fluid-structure coupling temperaturefield thermal stress

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APPLICATION OF TIME-VARYING VISCOUS GROUT IN GRAVEL-FOUNDATION ANTI-SEEPAGE TREATMENT

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Journal of Hydrodynamics 2011年第3期23卷 391-397页

作者： CHENG Peng-da LI Lu TANG Ju WANG Dao-zeng Shanghai Institute of Applied Mathematics and Mechanics Shanghai university Shanghai 200072 China Beijing Wangleihong Foundation Project Co. Ltd Beijing 100071 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai university Shanghai 200072 China

The time-varying viscosity of common grout and the controllable grout are measured with a rotation viscometer in experiments. The time-varying viscosity of grout is analyzed according to the characteristics in the process of anti-seepage treatment for gravel foundation. The principle of effective stress for porous medium is applied to analyzes the fluid-structure coupling in grouting. In the consideration of coupling physical variables, dynamic models of porosity, permeability and viscosity are constructed. The diffusion radius can thus be defined by the foundational porosity. The distribution of holes in field experiments is designed according to the diffusion radius of grout. Then, the permeability test is designed to verify the grout effect. The calculated diffusion radius coincides with experimental results, and the permeability meets the requirements of the project, which is valuable for the anti-seepage treatment in gravel foundation.

关键词： fluid-structure coupling viscosity gravel foundation

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NUMERICAL SIMULATION OF SOUND RADIATION ON GEARBOX'S HOUSING

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Chinese Journal of Mechanical Engineering 2008年第3期21卷 26-30页

作者： XIANG Changle WANG Wenping LIU Hui National Key Laboratory of Vehicle Transmission Beijing Institute of Technology Beijing 100081 China

The fluid-structure coupling finite element model and the boundary element model of a complex gearbox＇s housing are built based on the theory of fluid-structure coupling finite element method and boundary element method. At the same time, the exciting forces of the housing are analyzed and applied to the finite element models. Firstly, vibration of the housing is calculated by the fluid-structure coupling finite element model; secondly, the calculated result is verified by the experiment; finally, sound radiation of the housing is calculated by the boundary element. According to the calculated results, the housing adds some ribs not only to increase the strength, but also to reduce the sound radiation of the housing. At last, the sound radiation of the modified housing is calculated, which shows that the sound radiation of the modified housing with ribs is lower.

关键词： Sound radiation Finite element model Boundary element model fluid-structure coupling

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Effect of the Wall Thickness of the Vessel on FFRCT of Carotid Artery Stenosis

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Computer Modeling in Engineering & Sciences 2019年第12期121卷 835-844页

作者： Long Yu Kesong Xu Jun Wan Haiyan Lu Shengzhang Wang Institute of Biomechanics Department of Aeronautics and AstronauticsFudan UniversityShanghaiChina Interventional Department Shanghai Jing’an District Central HospitalShanghaiChina Interventional Ultrasound Division of VIP Clinic Department Dongfang Hospital Affiliated to Tongji UniversityShanghaiChina

Fractional flow reserve(FFR)computed from computed tomography angiography(CTA),i.e.,FFRCT has been used in the clinic as a noninvasive parameter for functional assessment of coronary artery *** has also been suggested to be used in the assessment of carotid artery *** wall thickness of the vessel is an important parameter when establishing a fluid-structure coupling model of carotid *** work studies the effect of the vessel wall thickness on hemodynamic parameters such as FFRCT in carotid *** of carotid stenosis are established based on CTA image data using computer-aided design *** is assumed that the vessel wall is a linear elastic and isotropic material,and the blood an incompressible Newtonian *** the pulsating flow condition,ANSYS Transient Structural and CFX are used to simulate the blood flow of fluid-structure coupling in the carotid stenosis model in order to obtain hemodynamic parameters and the corresponding *** results show that when the elastic modulus of the vessel wall is fixed,FFRCT will decrease with the increase of the wall ***,FFRCT will decrease with the increase of the elastic modulus when the wall thickness is *** difference in hemodynamic parameters such as FFRCT,however,is relatively small if the stiffness of the two models are *** results demonstrate that the effect of the vessel wall thickness,especially for a model with small elastic modulus,should be taken into account in using FFRCT for functional assessment of carotid ***,under the linear elasticity and isotropic material assumptions,the stiffness coefficient may replace the elastic modulus and wall thickness as a parameter reflecting material property of the vessel wall in the carotid stenosis model.

关键词： Carotid artery stenosis fractional flow reserve fluid-structure coupling numerical simulation stiffness coefficient

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A Novel Approach for the Numerical Simulation of fluid-structure Interaction Problems in the Presence of Debris

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fluid Dynamics & Materials Processing 2020年第5期16卷 979-991页

作者： Miaomiao Ren Xiaobin Shu Luohe Vocational College of Food Luohe462300China

A novel algorithm is proposed for the simulation of fluid-structure interaction *** particular,much attention is paid to natural phenomena such as debris *** fluid part(debris flow fluid)is simulated in the framework of the smoothed particle hydrodynamics(SPH)approach,while the solid part(downstream obstacles)is treated using the finite element method(FEM).fluid-structure coupling is implemented through dynamic boundary *** particular,the software“TensorFlow”and an algorithm based on Python are combined to conduct the required *** simulation results show that the dynamics of viscous and non-viscous debris flows can be extremely different when there are obstacles in the downstream *** implemented SPH-FEM coupling method can simulate the fluid-structure coupling problem with a reasonable approximation.

关键词： fluid-structure coupling SPH FEM TensorFlow python dynamic boundary conditions

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