An Efficient Numerical Method for Higher Order Springing Induced Loads
高阶弹振诱发载荷的有效数值方法
基本信息
- 批准号:311018823
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2016
- 资助国家:德国
- 起止时间:2015-12-31 至 2018-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The aim of this project is to further develop a three dimensional boundary element method based on Rankine sources to predict sectional loads acting on ship structures in waves taking into account springing induced hydroelasticity effects. Wave induced forces leading to resonant ship responses are subdivided into Froude-Krylov, radiation and diffraction forces. For higher order springing it is important to consider nonlinear effects related to Froude-Krylov forces. These forces are computed in each time step based on the instantaneous wetted surface. With regard to springing diffraction and radiation forces can be treated in a linear way. They are computed in the frequency domain and transferred in the time domain using convolution integrals. To account for hydroelasticity effects the flow equations are coupled with the equations of motion (rigid and elastic). The elastic deformations are computed using a modal decomposition approach to efficiently solve a reduced set of natural modes. A Vlasov beam and three dimensional Finite-Element models will be used. Further, simplified methods for prediction of hydrodynamic damping will be developed and verified. The methods to be developed are extensively validated using results from model tests and field methods based on Reynolds-Averaged-Navier-Stokes-Equations.
本项目的目的是进一步发展一种基于朗肯源的三维边界元方法,以预测波浪中作用于船体结构上的截面载荷,并考虑弹簧诱导的水弹性效应。引起船舶共振响应的波浪诱导力又细分为弗劳德-克雷洛夫力、辐射力和绕射力。对于高阶弹性,重要的是要考虑与弗劳德-克雷洛夫力有关的非线性效应。这些力是基于瞬时湿表面在每个时间步长中计算的。关于弹簧,绕射力和辐射力可以用线性方法来处理。它们在频域中计算,并使用卷积积分在时间域中传输。为了考虑水弹性效应,流动方程与运动方程(刚性和弹性)相耦合。弹性变形的计算使用了一种模式分解方法,以有效地求解一组简化的固有模式。将使用Vlasov梁和三维有限元模型。此外,还将开发和验证流体动力阻尼器的简化预测方法。模型试验和基于雷诺平均的纳维斯托克斯方程的现场方法的结果广泛地验证了将要开发的方法。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
A time domain boundary element method for wave added resistance of ships taking into account viscous effects
- DOI:10.1016/j.oceaneng.2018.05.010
- 发表时间:2018-08
- 期刊:
- 影响因子:5
- 作者:M. Riesner;O. E. Moctar
- 通讯作者:M. Riesner;O. E. Moctar
Prediction of non-linear ship responses in waves considering forward speed effects
考虑前进速度影响的非线性船舶波浪响应预测
- DOI:10.1080/09377255.2016.1221607
- 发表时间:2016
- 期刊:
- 影响因子:2.2
- 作者:Riesner;von Graefe;Shigunov;el Moctar
- 通讯作者:el Moctar
Rankine source time domain method for nonlinear ship motions in steep oblique waves
陡斜波中船舶非线性运动的朗肯源时域法
- DOI:10.1080/17445302.2018.1498568
- 发表时间:2018
- 期刊:
- 影响因子:2.1
- 作者:Riesner;Chillcce;el Moctar
- 通讯作者:el Moctar
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Professor Dr.-Ing. Bettar Ould El Moctar其他文献
Professor Dr.-Ing. Bettar Ould El Moctar的其他文献
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{{ truncateString('Professor Dr.-Ing. Bettar Ould El Moctar', 18)}}的其他基金
Development of a Numerical Method to Predict Hydrodynamic Cavitation Induced Erosion
预测水动力空化引起的侵蚀的数值方法的开发
- 批准号:
290858502 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Research Grants
Investigation of Sloshing in partially filled tanks considering density ratio and phase transition effects
考虑密度比和相变效应的部分填充储罐晃动研究
- 批准号:
298747191 - 财政年份:2016
- 资助金额:
-- - 项目类别:
Research Grants
Passive active control of cavitating flows around ship hydrofoils
船舶水翼周围空化流的被动主动控制
- 批准号:
533951202 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Cavitation Control using Mesoscale Surface Structuring in Marine Engineering and Hydraulic Systems
在海洋工程和液压系统中使用中尺度表面结构进行空化控制
- 批准号:
469042952 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
Numerical and experimental investigations of hydroelastic effects of very large moored and mechanically coupled multibody offshore floating structures
超大型系泊和机械耦合多体海上浮式结构的水弹性效应的数值和实验研究
- 批准号:
448471847 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
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