| 桥梁移动荷载识别的几个问题 |
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| 引用本文： | 朱军华,余岭.桥梁移动荷载识别的几个问题[J].中山大学学报(自然科学版),2008,47(Z2). |
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| 作者姓名： | 朱军华 余岭 |
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| 作者单位： | 暨南大学重大工程灾害与控制教育部重点实验室//力学与土木工程系,广东,广州,510632 |
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| 基金项目： | 教育部科学技术研究重点项目，暨南大学校科研和教改项目 |
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| 摘 要： | 基于时域法TDM求解思路,阐述了基于预处理共轭梯度法(PCGM)和基于矩量法(MOM)的移动荷载识别方法的基本原理及仿真计算研究成果,分析讨论了预优矩阵选取、基函数选取、不适定问题解决方案、计算量及计算时间等问题,并指出两方法具有良好的应用前景,尤其是MOM计算效率高,适合实时识别。最后还指出了仍需进一步研究的问题。
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| 关 键 词： | 移动荷载识别 桥梁 矩量法 共轭梯度法 |
Some Issues on the Identification of Moving Loads on Bridges |
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| ZHU Jun-hua,YU Ling.Some Issues on the Identification of Moving Loads on Bridges[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2008,47(Z2). |
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| Authors: | ZHU Jun-hua YU Ling |
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| Abstract: | Based on the time domain method(TDM),the theoretical background,simulation results and some issues on moving loads identification are presented when the preconditioning conjugate gradient method(PCGM) and the method of moments(MOM) are adopted,particularly in some issues,such as,selection of preconditioned matrixes,proper determination of basis functions,some improved solutions for illconditioned problems on moving loads identification,computation cost and consuming time etc.The numerical simulation results show that both PCGM and MOM have good prospective application fields.Especially,MOM has shorter executive time and higher computation efficiency.Some problems have also been finally mentioned for further study. |
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| Keywords: | moving loads identification bridges method of moments preconditioning conjugate gradient method |
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