| 预应力对预应力梁振动的影响 |
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| 引用本文： | 吕中荣,罗绍湘,刘济科. 预应力对预应力梁振动的影响[J]. 中山大学学报(自然科学版), 2006, 45(2): 119-120,128 |
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| 作者姓名： | 吕中荣 罗绍湘 刘济科 |
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| 作者单位： | 1. 中山大学应用力学与工程系,广东,广州,510275
2. 香港理工大学土木及结构工程系,香港,九龙,红磡 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目(20050558032)，高等学校优秀青年教师教学科研奖励计划资助项目(TRAPOYT2001)，广东省自然科学基金资助项目(05003295) |
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| 摘 要： | 研究了预应力梁的自由振动和受迫振动响应。将预应力桥梁简化为简支的欧拉梁模型,并利用有限元法加以离散。讨论了预应力对梁固有频率和受迫振动响应的影响。研究表明预应力对梁的低阶频率和位移响应的影响较大。
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| 关 键 词： | 振动 预应力 动力学 动态响应 |
| 文章编号： | 0529-6579（2006）02-0119-03 |
| 收稿时间： | 2005-04-04 |
| 修稿时间： | 2005-04-04 |
Effects of Prestress Force on Vibration of a Prestressed Beam |
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| L Zhong-rong,LAW Siu-seong,LIU Ji-ke. Effects of Prestress Force on Vibration of a Prestressed Beam[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2006, 45(2): 119-120,128 |
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| Authors: | L Zhong-rong LAW Siu-seong LIU Ji-ke |
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| Affiliation: | 1. Department of Applied Mechanics and Engineering,Sun Yat-sen University, Guangzhou 510275, China; 2. Civil and Structural Engineering Department, The Hong Kong Polytechnic University, Hunghom, Kowloon, Hong Kong |
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| Abstract: | Prestressing force has been used widely with long span structure,and it is the most important factor to describe the load-carrying capacity of the structure.Free and forced vibrations of the beam are studied.The prestressed bridge is modeled as a simply supported Euler-Bernoulli beam and it is discretized using finite element method.The effects of the prestress force on the modal frequencies and dynamic responses are discussed.It is found that the effects of prestress force on the lower natural frequencies and the dynamic displacement response of the beam are large. |
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| Keywords: | vibration prestress force dynamics dynamic response |
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