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四角架筒型基础气浮过程中运动特性研究

太阳能学报 2022年第4期43卷 428-433页

作者：刘宪庆赵明阶张浦阳罗盛钟韡重庆交通大学河海学院重庆400074 天津大学建筑工程学院天津300072 中国人民解放军陆军勤务学院重庆401331

以四角架筒型基础为研究对象,通过在静水及规则波作用下的模型试验对影响结构气浮过程中运动特性的因素进行分析。结果表明,结构摇荡运动的附加质量系数随吃水的增加呈下降趋势,都大于船舶动力学的建议值1.2;随着吃水的增加,垂荡运动呈... 详细信息

以四角架筒型基础为研究对象,通过在静水及规则波作用下的模型试验对影响结构气浮过程中运动特性的因素进行分析。结果表明,结构摇荡运动的附加质量系数随吃水的增加呈下降趋势,都大于船舶动力学的建议值1.2;随着吃水的增加,垂荡运动呈先减小后增大的趋势,而纵摇运动呈减小的趋势;较浅水深增强了结构的竖向运动,垂荡和纵摇运动的最大幅值随水深的变化呈相反的变化趋势;四角架筒型基础结构在4.5 m吃水和12.5 m水深下的运动响应特性最佳。

关键词：海上风力机传递函数流体结构相互作用筒型基础附加质量

船与桥墩相撞后的二维流体动力学数值模拟研究

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北京大学学报（自然科学版） 2013年第4期49卷 579-584页

作者：罗雄平宁波大学机械工程与力学学院宁波315211

将不可压缩Navier-Stokes方程与浸入边界法相结合,研究在流体中平面运动的物体(船)绕另一个静止物体(桥墩)的二维运动过程,分析船所受到的流体阻力、升力以及受流体作用后船的运动轨迹。结果表明在船绕着桥墩运动的初期,升力和阻力曲线... 详细信息

将不可压缩Navier-Stokes方程与浸入边界法相结合,研究在流体中平面运动的物体(船)绕另一个静止物体(桥墩)的二维运动过程,分析船所受到的流体阻力、升力以及受流体作用后船的运动轨迹。结果表明在船绕着桥墩运动的初期,升力和阻力曲线出现有限振幅的起伏现象,不久,船的升力和阻力系数逐渐趋向稳定,做周期性小幅振荡。船的顺时针方向角速度受水流作用逐渐变小,然后变为逆时针方向。最后船的尾部远离桥墩,表明不会与桥墩二次碰撞。船的运行轨迹与实船实验的结果非常接近。

关键词：不可压缩Navier-Stokes方程浸入边界法流体结构相互作用二次碰撞船撞桥

非结构化网格浸入边界法的流固耦合数值模拟(英文)

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Journal of Marine Science and Application 2010年第2期9卷 181-186页

作者：明平剑孙扬哲段文洋张文平 College of Power and Energy Engineering Harbin Engineering University College of Shipbuilding Engineering Harbin Engineering University Wuhan Second Ship Design and Research Institute

This paper presents an improved unstructured grid immersed boundary *** advantages of both immersed boundary method and body fitted grids which are generated by unstructured grid technology are used to enhance the computation efficiency of fluid structure interaction in complex *** Navier-Stokes equation was discretized spacially with collocated finite volume method and Euler implicit method in time *** rigid body motion was simulated by immersed boundary method in which the fluid and rigid body interface interaction was dealt with VOS(volume of solid) method.A new VOS calculation method based on graph was presented in which both immersed boundary points and cross points were collected in arbitrary order to form a *** method is verified with flow past oscillating cylinder.

关键词：流体结构相互作用数值模拟边界法非结构网格非结构化网格网格生成技术计算效率刚体运动

CFD理论黏性流场中三维振动水翼的非定常水动力性能(英文)

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Journal of Marine Science and Application 2010年第3期9卷 250-255页

作者： Nazir Zulfiqar 苏玉民王兆立 State Key Laboratory of Autonomous Underwater Vehicle Harbin Engineering University PN Dockyard West Wharf RoadKarachi 74000Pakistan

The motion of the fins and control surfaces of underwater vehicles in a fluid is an interesting and challenging research *** the effect of fin oscillations on the fluid flow around such a body is highly unsteady, generating vortices and requiring detailed analysis of fluid-structure *** understanding of the complexities of such flows is of interest to engineers developing vehicles capable of high dynamic performance in their propulsion and *** the present study, a CFD based RANS simulation of a 3-D fin body moving in a viscous fluid was *** investigated hydrodynamic performance by evaluating the hydrodynamic coefficients (lift, drag and moment) at two different oscillating frequencies.A parametric analysis of the factors that affect the hydrodynamic performance of the fin body was done, along with a comparison of results from *** results of the simulation were found in close agreement with experimental results and this validated the simulation as an effective tool for evaluation of the unsteady hydrodynamic coefficients of 3-D *** work can be further be used for analysis of the stability and maneuverability of fin actuated underwater vehicles.

关键词：水动力系数粘性流体非定常 CFD 三维流体结构相互作用水翼动力性能参数

开阔海洋环境中的鲍鱼潜式网箱系统的工程分析

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渔业现代化 2014年第6期41卷 72-73页

在还未被利用的开阔海洋环境中开发鲍鱼养殖存在极大的可能性.鲍鱼是一种摄食巨藻的贝类.本研究对具有组装式框架结构的一个商业规模的鲍鱼潜式养殖网箱养成系统的开发进行了描述.使用计算流体力学软件分析了围养鲍鱼的结构物内的流场特... 详细信息

在还未被利用的开阔海洋环境中开发鲍鱼养殖存在极大的可能性.鲍鱼是一种摄食巨藻的贝类.本研究对具有组装式框架结构的一个商业规模的鲍鱼潜式养殖网箱养成系统的开发进行了描述.使用计算流体力学软件分析了围养鲍鱼的结构物内的流场特性.使用一个模拟流体结构相互作用的Morison方程类的有限元模型,调研了锚碇的围闭结构的水动力响应.

关键词：鲍鱼养殖海洋环境养殖网箱系统流体结构相互作用 Morison方程工程计算流体力学

Investigation on the Forced Response of a Radial Turbine under Aerodynamic Excitations

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Journal of Thermal Science 2016年第2期25卷 130-137页

作者： MA Chaochen HUANG Zhi QI Mingxu School of Mechanical Engineering Beijing Institute of Technology

Rotor blades in a radial turbine with nozzle guide vanes typically experience harmonic aerodynamic excitations due to the rotor stator interaction. Dynamic stresses induced by the harmonic excitations can result in high cycle fatigue(HCF) of the blades. A reliable prediction method for forced response issue is essential to avoid the HCF problem. In this work, the forced response mechanisms were investigated based on a fluid structure interaction(FSI) method. Aerodynamic excitations were obtained by three-dimensional unsteady computational fluid dynamics(CFD) simulation with phase shifted periodic boundary conditions. The first two harmonic pressures were determined as the primary components of the excitation and applied to finite element(FE) model to conduct the computational structural dynamics(CSD) simulation. The computed results from the harmonic forced response analysis show good agreement with the predictions of Singh's advanced frequency evaluation(SAFE) diagram. Moreover, the mode superposition method used in FE simulation offers an efficient way to provide quantitative assessments of mode response levels and resonant strength.

关键词：涡轮转子叶片强迫响应空气动力计算流体动力学模拟激励径向流体结构相互作用有限元模拟

Three-dimensional numerical simulation of a vertical axis tidal turbine using the two-way fluid structure interaction approach

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第8期14卷 574-582页

作者： Syed-shah KHALID Liang ZHANG Xue-wei ZHANG Ke SUN Deepwater Engineering Research Center Harbin Engineering University

The objective of this study was to develop, as well as validate the strongly coupled method (two-way fluid structural interaction (FSI)) used to simulate the transient FSI response of the vertical axis tidal turbine (VATT) rotor, subjected to spatially varying inflow. Moreover, this study examined strategies on improving techniques used for mesh deformation that account for large displacement or deformation calculations. The blade's deformation for each new time step is considered in transient two-way FSI analysis, to make the design more reliable. Usually this is not considered in routine one-way FSI simulations. A rotor with four blades and 4-m diameter was modeled and numerically analyzed. We observed that two-way FSI, utilizing the strongly coupled method, was impossible for a complex model; and thereby using ANSYS-CFX and ANSYS-MECHANICAL in work bench, as given in ANSYS-WORKBENCH, helped case examples 22 and 23, by giving an error when the solution was run. To make the method possible and reduce the computational power, a novel technique was used to transfer the file in ANSYS-APDL to obtain the solution and results. Consequently, the results indicating a two-way transient FSI analysis is a time- and resource-consuming job, but with our proposed technique we can reduce the computational time. The ANSYS STRUCTURAL results also uncover that stresses and deformations have higher values for two-way FSI as compared to one-way FSI. Similarly, fluid flow CFX results for two-way FSI are closer to experimental results as compared to one-way simulation results. Additionally, this study shows that, using the proposed method we can perform coupled simulation with simple multi-node PCs (core i5).

关键词：流体结构相互作用三维数值模拟涡轮机垂直轴潮汐 ANSYS 瞬态响应变形计算

Bifurcation analysis for vibrations of a turbine blade excited by air flows

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Science China(Technological Sciences) 2016年第8期59卷 1217-1231页

作者： WANG Dan CHEN YuShu HAO ZhiFeng CAO QingJie School of Astronautics Harbin Institute of Technology Harbin 150001 China

模仿汽轮机片和即将来临的空气流动的液体结构相互作用(FSI ) 的一个减少的 three-degree-of-freedom 模型被建议。运动的方程由联合弯曲和片以及代表的货车 der Pol 摆动的扭转组成液体变化时间。1:1 系统的内部回声与多重规模方法被... 详细信息

模仿汽轮机片和即将来临的空气流动的液体结构相互作用(FSI ) 的一个减少的 three-degree-of-freedom 模型被建议。运动的方程由联合弯曲和片以及代表的货车 der Pol 摆动的扭转组成液体变化时间。1:1 系统的内部回声与多重规模方法被分析，并且调整方程被导出。二参数的分叉图被计算。包括 detuning 参数和减少的频率，系统参数的效果在结构和液体的回答上被调查。分叉曲线被计算，稳定性被检验 Jacobian 矩阵的特征值决定。结果显示包括僵绳的不变的解决方案的富有的动态现象 -- 节点和 Hopf 分叉能发生在某些参数条件下面。不稳定的答案发生的参数区域应该被避免保留片的安全操作。分析答案被直接数字的模拟验证。

关键词：叶片振动分岔分析涡轮叶片空气流动流体结构相互作用激励运动方程多尺度分析

Numerical simulation of unsteady cavitating flows around a transient pitching hydrofoil

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Science China(Technological Sciences) 2014年第1期57卷 101-116页

作者： HUANG Biao WU Qin WANG GuoYu School of Mechanical and Vehicular Engineering Beijing Institute of Technology

The objective of this paper is to improve the understanding of the influence of multiphase flow on the turbulent closure model,the interplay between vorticity fields and cavity dynamics around a pitching *** effects of pitching rate on the subcavitating and cavitating response of the pitching hydrofoil are also *** particular,we focus on the interactions between cavity inception,growth,and shedding and the vortex flow structures,and their impacts on the hydrofoil *** calculations are 2-D and performed by solving the incompressible,multiphase Unsteady Reynolds Averaged Navier Stokes(URANS)equations via the commercial CFD code *** k-SST(Shear Stress Transport)turbulence model is used along with the transport equation-based cavitation *** density correction function is considered to reduce the eddy viscosity according to the computed local fluid mixture *** calculation results are validated with experiments conducted by Ducoin et al.(see Computational and experimental investigation of flow over a transient pitching hydrofoil,Eur J Mech/B Fluids,2009,28:728–743 and An experimental analysis of fluid structure interaction of a flexible hydrofoil in various flow regimes including cavitating flow,Eur J Mech B/fluids,2012,36:63–74).Results are shown for a NACA66 hydrofoil subject to slow(quasi static,6°/s,*0.18)and fast(dynamic,63°/s,*1.89)pitching motions from=0°to=15°.Both subcavitaing(=8.0)and cavitating(=3.0)flows are *** subcavitating flow(=8.0),low frequency fluctuations have been observed when the leading edge vortex shedding occurs during stall,and delay of stall is observed with increasing pitching *** cavitating flow(=3.0),small leading edge cavities are observed with the slow pitching case,which significantly modified the vortex dynamics at high angles of attack,leading to high frequency fluctuations of the hydrodynamic coefficients and different stall behaviors compared to the subcavitating

关键词：水翼船非定常数值模拟流体结构相互作用空泡流计算结果水动力系数实验分析