| 空间一维结构分布动载荷时域识别方法 |
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| 引用本文： | 万成,严波.空间一维结构分布动载荷时域识别方法[J].应用数学和力学,2017,38(9):967-978. |
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| 作者姓名： | 万成 严波 |
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| 作者单位： | 1重庆大学 航空航天学院, 重庆 400044;2重庆交通大学 土木工程学院, 重庆 400074 |
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| 基金项目： | 国家自然科学基金(51277186)The National Natural Science Foundation of China(51277186) |
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| 摘 要： | 提出一种适用于空间一维结构分布动载荷的时域识别方法.基于空间分段和时间分段的思想, 推导了载荷时程识别的公式和过程.用MATLAB编写了载荷识别程序，以受分布动载荷简支梁和受随机风载荷输电导线的载荷识别对方法和程序进行验证, 并通过仿真试验研究了噪声对载荷识别的影响.结果表明，该方法对于线性问题有很高的识别精度，对于弱非线性问题能够满足工程应用要求，为分布动载荷时域识别提供了有效的途径.
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| 关 键 词： | 分布动载荷 载荷识别 时域方法 |
| 收稿时间： | 2017-01-06 |
A Time Domain Identification Method for Distributed Dynamic Loads on 1D Spatial Structures |
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| WAN Cheng,YAN Bo.A Time Domain Identification Method for Distributed Dynamic Loads on 1D Spatial Structures[J].Applied Mathematics and Mechanics,2017,38(9):967-978. |
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| Authors: | WAN Cheng YAN Bo |
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| Institution: | 1State Key Laboratory of Structural Analysis for Industrial Equipment(Dalian University of Technology), Dalian, Liaoning 116023, P.R.China;2School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R.China |
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| Abstract: | A time domain identification method for distributed dynamic loads on 1D spatial structures was proposed.Based on the idea of spatial and temporal divisions,the formula and process for load time history identification were derived.The load identification program was compiled by means of MATLAB,and the identification method was verified through 2 examples:a simply supported beam subjected to distributed dynamic loads and a power line subjected to stochastic wind loads.Moreover,the effect of noise on the load identification was investigated through numerical simulation.It is shown that the distributed loads can be accurately identified for linear problems and approximately identified for weakly nonlinear problems with the presented method,which provides an efficient way to identify distributed loads on engineering structures. |
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| Keywords: | distributed dynamic load load identification time domain method |
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