[1]孙芳锦,梁 爽.流固耦合问题中降阶模型的校正研究[J].西安建筑科技大学学报:自然科学版,2014,46(06):822-826.[doi:10.15986/j.1006-7930.2014.06.010]
　SUN FangjinLIANG Shuang.Study on the calibration of reduced order models in fluid-structure interaction[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(06):822-826.[doi:10.15986/j.1006-7930.2014.06.010]
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流固耦合问题中降阶模型的校正研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
46
期数:
2014年06期
页码:
822-826
栏目:
出版日期:
2014-12-31

文章信息/Info

Title:
Study on the calibration of reduced order models in fluid-structure interaction
文章编号:
1006-7930(2014)06-0822-05
作者:
孙芳锦; 梁 爽
(辽宁工程技术大学建筑工程学院,辽宁 阜新 123000)
Author(s):
SUN FangjinLIANG Shuang
(College of Civil Engineering and Architecture, Liaoning Technical University, Fuxin 123000,China)
关键词:
流固耦合; 流体方程; 降阶模型; 校正模型; 遗传算法
Keywords:
fluid-structure interaction;  Fluid equations;  reduced order model;  calibrated model;  Genetic algorithm
分类号:
TH113.1
DOI:
10.15986/j.1006-7930.2014.06.010
文献标志码:
A
摘要:
对流体使用降阶模型是流固耦合计算中为提高计算效率常用的手段之一，但采用降阶模型对模型维数的降低，或全阶模型数据与降阶模型方程的不一致性会影响降阶模型的准确性．本文引入人工涡常量和遗传算法对流固耦合问题中降阶模型进行校正研究，首先基于伽辽金投影法和本征正交分解法投射到最主要本征模态空间上，得到流体的降阶模型；然后引入人工“涡”对降阶模型的系数进行校正，最后采用遗传算法对校正模型中的系数进行估计．将本文提出的校正降阶模型应用于典型流固耦合问题分析中，对比了校正前后位移和力的变化，以及校正前后降阶模型的误差变化，结果表明校正后的降阶模型的计算准确性和效率大大提高，证实了降阶模型校正的必要性和本文降阶模型校正方法的有效性．
Abstract:
Fluid reduced order models (ROM) are commonly used in fluid-structure interaction. However, the accuracy of reduced order models would be affected due to dimension reduction of reduced order models or inconsistency of full-order model and reduced order model. Study is performed on calibration of reduced order models combining artificial vortex with genetic algorithm. Fluid equations are projected onto major engin-modal space using Galerkin projection method and proper orthogonal decomposition to obtain fluid ROM. Calibration is performed by introducing artificial eddy to calibrate the coefficients of the ROM. Genetic algorithms are employed to estimate the coefficients. The proposed calibrated ROM is applied to the typical fluid-structure interaction computation. Displacement, force and errors before and after calibration are compared respectively. The results show that accuracy and efficiency are greatly improved with calibrated ROM, which validates the calibrated ROM.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2014-04-08  修改稿日期：2014-12-02
基金项目：国家自然科学基金项目（51108345）；同济大学土木工程防灾国家重点实验室开放基金项目（SLDRCE-MB-04）；辽宁省教育厅基金一般项目（L2013134）
作者简介：孙芳锦（1981‐），女，博士，副教授，主要研究方向为建筑结构抗风．E-mail:e_dm@163.com
更新日期/Last Update: 2015-09-01