| 对悬索桥对称竖弯基频近似公式的修正 |
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| 引用本文： | 鞠小华,廖海黎,沈锐利. 对悬索桥对称竖弯基频近似公式的修正[J]. 土木工程学报, 2002, 35(1): 44-49 |
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| 作者姓名： | 鞠小华 廖海黎 沈锐利 |
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| 作者单位： | 1. 中国铁道建筑总公司
2. 西南交通大学 |
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| 摘 要： | 分析了边缆和桥塔刚度对悬索桥对称振动基频的影响 ,然后基于能量原理 ,在分别考虑了边缆和桥塔刚度的影响以及悬索桥自由振动实际振型的情况下 ,用Rayleigh Ritz法对悬索桥一阶竖向挠曲自由振动频率近似计算公式作了进一步的改进 ,用以对五座悬索桥算例的计算 ,计算结果和精确的有限元解非常接近 ,其精度可以满足方案选择和初步设计阶段的要求
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| 关 键 词： | 悬索桥 自由振动 基频 近似计算 |
| 文章编号： | 1000-131X(2002)01-0044-06 |
| 修稿时间： | 2000-02-19 |
MODIFICATION ON SIMPLIFIED FORMULA OF SYMMETRIC-VERTICAL NATURAL FREQUENCIES FOR SUSPENSION BRIDGES |
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| HL. MODIFICATION ON SIMPLIFIED FORMULA OF SYMMETRIC-VERTICAL NATURAL FREQUENCIES FOR SUSPENSION BRIDGES[J]. China Civil Engineering Journal, 2002, 35(1): 44-49 |
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| Authors: | HL |
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| Abstract: | A simplified formula of symmetric?vertical natural frequency for suspension bridges is derived in the paper.The pylon stiffness is not to be considered.The results of formula are small than that of the finite element method.We consider the effects of the side?cable and pylon stiffness and real vibration modes.A modification on simplified formula is proposed in the paper.It is based on the Rayleigh?Ritz method.Five suspension bridges are selected as numerical examples.The results of modification are much agreed with that of the finite element method.The requirements of the schematic design and preliminary design are satisfied. |
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| Keywords: | Suspension bridge free vibration natural freguency approximation calcutation |
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