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首页> 外文学位 >Validation of CFD-MBD FSI for high-fidelity simulations of full-scale WAM-V sea-trials with suspended payload.
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Validation of CFD-MBD FSI for high-fidelity simulations of full-scale WAM-V sea-trials with suspended payload.

机译：CFD-MBD FSI的验证，适用于具有有效负载的全尺寸WAM-V海试的高保真模拟。

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摘要

High-fidelity CFD-MBD FSI (Computational Fluid Dynamics - Multi Body Dynamics Fluid-Structure Interaction) code development and validation by full-scale experiments is presented, for a novel hull form, WAM-V (Wave Adaptive Modular Vessel). FSI validation experiments include cylinder drop with suspended mass and 33 ft WAM-V sea-trials. Calm water and single-wave sea-trails were with the original suspension, while the rough-water testing was with a second generation suspension. CFDShip-Iowa is used as CFD solver, and is coupled to Matlab Simulink MBD models for cylinder drop and second generation WAM-V suspension. For 1DOF cylinder drop, CFD verification and validation (V&V;) studies are carried out including grid and time-step convergence. CFD-MBD results for 2DOF cylinder drop show that 2-way coupling is required to capture coupled physics. Overall, 2-way results are validated with an overall average error value of E=5.6%DR for 2DOF cylinder drop. For WAM-V in calm water, CFD-MBD 2-way results for relative pod angle are validated with E=14.2%DR. For single-wave, CFD-MBD results show that 2-way coupling significantly improves the prediction of the peak amplitude in pontoon motions, while the trough amplitudes in suspension motions are under-predicted. The current CFD-MBD 2-way results for single-wave are validated with E=17%DR. For rough-water, simulations are carried out in regular head waves representative of the irregular seas. CFD-MBD 2-way results are validation with E=23%D for statistical values and the Fourier analysis results, which is reasonable given the differences between simulation waves and experiments.
机译：提出了针对新型船体形式WAM-V（波状自适应模块船）的高保真CFD-MBD FSI（计算流体动力学-多体动力学流体-结构相互作用）代码开发和验证。 FSI验证实验包括悬挂质量的气瓶掉落和33英尺的WAM-V海试。静水和单波海浪使用原始悬架，而粗糙水测试使用第二代悬架。 CFDShip-Iowa用作CFD求解器，并与Matlab Simulink MBD模型耦合，用于汽缸下降和第二代WAM-V悬架。对于一自由度汽缸下降，进行了CFD验证和确认（V＆V;）研究，包括网格和时间步收敛。 2DOF圆柱体下落的CFD-MBD结果表明，需要两向耦合来捕获耦合的物理场。总体而言，对于2自由度气缸掉落，通过2个平均结果的总平均误差值为E = 5.6％DR来验证。对于在平静水中的WAM-V，相对荚角的CFD-MBD 2向结果通过E = 14.2％DR进行了验证。对于单波，CFD-MBD结果表明，双向耦合显着改善了浮桥运动峰值幅度的预测，而悬架运动的波谷幅度却被低估了。当前单波CFD-MBD 2路结果通过E = 17％DR进行了验证。对于粗糙水域，在代表不规则海洋的规则头波中进行模拟。 CFD-MBD 2路结果通过E = 23％D的统计值和傅里叶分析结果进行验证，考虑到仿真波和实验之间的差异，这是合理的。

著录项

  • 作者

    Conger, Michael Anthony.;

  • 作者单位

    The University of Iowa.;

  • 授予单位 The University of Iowa.;
  • 学科 Mechanical engineering.
  • 学位 M.S.
  • 年度 2015
  • 页码 88 p.
  • 总页数 88
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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