多点激励简支梁桥车桥耦合振动响应
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O325

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国家自然基金(51978063)山西省重点研发计划项目(201803D31076) 山西省重点研发计划项目(201903D121176) 国家大学生创新创业项目(2020350)


Research on the coupled vibration response of simply supported beam bridge under multi-point excitation
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    摘要:

    为研究多点激励下,简支梁桥跨中截面的动力响应,基于车辆动力学的相关原理,推导多车车辆动力学模型,采用模态综合法建立多车车桥耦合分析系统,并与相关文献算例结果进行对比分析,得出该方法与文献算例相对误差在6%以内,验证方法的正确性;通过分析不同车辆间距和车辆数量通过桥梁时,跨中截面的动力响应变化,结果表明:在一定车辆间距和车辆作用下,车辆振动与桥梁的能量耗散相抵消,结构动力响应达到达到极值,且在多点激励下,部分国家的规范值相对偏小,建议在后续分析中加入多车激励响应的影响,相关研究成果可为公路桥梁多车车桥动力分析的提供参考。

    Abstract:

    In order to study the dynamic response of the mid-span section of simply supported beam bridge under multi-point excitation,Based on the relevant principles of vehicle dynamics, the multi-vehicle dynamic model is deduced, the multi-vehicle vehicle-bridge coupling system is established by using the modal synthesis method, the results are compared and analyzed with the examples in the relevant literature. The relative error between the method and the maximum mid-span section in the examples in the literature is within 6%. Analysis of different vehicle spacing and vehicle number of Bridges, the analysis of cross section in the dynamic response, the results show that under certain vehicle spacing and vehicle, the vehicle and bridge vibration energy dissipation phase offset, to reach maximum dynamic response of structure under multiple vehicle action and, part of the national standard value is relatively small, suggest adding more car excitation response in the subsequent analysis, the results for highway Bridges car axle dynamic analysis to provide more guidance.

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韩智强,李路遥,周勇军,等. 多点激励简支梁桥车桥耦合振动响应[J]. 科学技术与工程, 2021, 21(18): 7425-7432.
Han Zhiqiang, Li Luyao, Zhou Yongjun, et al. Research on the coupled vibration response of simply supported beam bridge under multi-point excitation[J]. Science Technology and Engineering,2021,21(18):7425-7432.

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  • 收稿日期:2020-12-28
  • 最后修改日期:2021-06-02
  • 录用日期:2021-04-11
  • 在线发布日期: 2021-07-29
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