| 摘要: |
| 为研究简支梁桥的自振特性及车-桥系统的有载频率，首先进行了简支梁自振频率的理论分析，然后采用有限元方法建立了简支梁计算模型，将结果与实测值进行对比，优选出合适的有限元计算方法.将车辆简化为集中质量块，建立了质量块-简支梁系统有限元计算模型.通过软件计算分析，得到桥梁结构的振动模态和不同车辆位置下的有载频率.将有限元分析结果及实测值与简支梁的自振频率比较，从而研究简支梁桥有载频率的变化特点，为实际工程应用提供理论参考. |
| 关键词: 有载频率 车-桥系统 简支梁桥 有限元法 |
| DOI：10.3969/J.ISSN.1000-5137.2021.04.007 |
| 分类号:U448.21 |
| 基金项目:上海市自然科学基金（18ZR1427900） |
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| Research on loaded frequency for simply supported bridge |
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WANG Ying1, PENG Li1, LI Wenting1, DUAN Haijuan2
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1.College of Civil Engineering, Shanghai Normal University, Shanghai 201418, China;2.School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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| Abstract: |
| In order to analyze the natural vibration characteristics of simply supported bridge and the loaded frequency of vehiclebridge system, theoretical analysis was carried out firstly, then the simply supported beam calculation model was built using finite element method, and the results were compared with the measured values to sort out the best finite element method. The finite element model of a mass block-simply supported beam system was built by regarding the vehicles as a concentrated mass block attached. Both the vibration models of the bridge system and the loaded frequencies of the vehicle-bridge system under diffident vehicle positions were obtained by software analyzing. As a result, the variation characteristics of the loaded frequency for this simply supported bridge were extracted and discussed through the comparison of the results from finite element method and the measured. This research provided reference material for real world engineering applications. |
| Key words: loaded frequency vehicle-bridge system simply supported bridge finite element method |
