| 适于大型工程结构的移动变载荷等效冲击加载方案研究 |
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| 引用本文： | 艾海峰,陈志坚,王路.适于大型工程结构的移动变载荷等效冲击加载方案研究[J].舰船科学技术,2009,31(5). |
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| 作者姓名： | 艾海峰 陈志坚 王路 |
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| 作者单位： | 1. 海军工程大学,船舶与动力学院,湖北,武汉,430033
2. 海军装备研究院,舰船论证研究所,北京,100161 |
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| 摘 要： | 为探讨移动载荷作用下的大型工程结构采用标准有限元程序进行动态响应分析的可行性,提出了移动变载荷的冲击等效加载方案,将时变连续移动载荷等效为一系列作用位置及有效作用时间均不同的冲击载荷,加载在有限元模型上进行结构的动态响应分析.以分析移动载荷作用下梁的动态响应为例,验证了该冲击等效加载方案的可行性,分析了积分步长及载荷离散时间步长对计算结果的影响,指出在一个载荷离散时间步长内,采用8个左右的积分步长,可保证计算精度.该等效方案可以拓展到移动载荷作用下的大型结构动态响应有限元分析.
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| 关 键 词： | 移动变载荷 等效冲击载荷 动态响应 |
Investigation on equivalent impact load scheme of moving variable load for large engineering structure |
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| AI Hai-feng,CHEN Zhi-jian,WANG Lu.Investigation on equivalent impact load scheme of moving variable load for large engineering structure[J].Ship Science and Technology,2009,31(5). |
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| Authors: | AI Hai-feng CHEN Zhi-jian WANG Lu |
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| Institution: | 1. College of Naval Architecture and Power;Naval University of Engineering;Wuhan430033;China;2. Institute of Naval Vessel;Naval Academy of Armament;Beijing100161;China |
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| Abstract: | The equivalent impact load scheme of moving variable load is presented to make a study of the feasibility of the dynamic response analysis of the large engineering structure under moving loads using standard finite element packages. The time varying,continuous,moving load is transformed into a series of equivalent impact loads with different loading positions and effective acting time,exerting on the finite element model for the dynamic response analysis. With an example of a beam under moving load,the feas... |
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| Keywords: | moving variable load equivalent impact load dynamic response |
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