逐级递进式高耗能抗撞磁流变阻尼器设计
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江苏大学土木工程与力学学院

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TH122

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国家自然科学基金项目(面上项目,重点项目,重大项目),国家科技攻关计划


Step-by-Step Progressive Design of High Energy Consumption Anti-collision Magnetorheological Dampers
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Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang jiangsu

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    摘要:

    为了更好的保护桥墩与船舶安全,针对桥墩防撞装置多为被动式耗能,其动那边态响应及防撞耗能效果较差,装置适应性有限等问题设计了一种用于桥墩的逐级递进式高耗能抗撞磁流变阻尼器。通过建立力学模型确立了阻尼器结构参数;使用有限元对结构强度及磁路进行分析,阻尼器结构部件强度和磁路设计均满足要求;结果表明:缸筒内设置三个活塞,在不同的撞深位移下可协同工作将阻尼器的耗能分成三个阶段,增大了装置的刚度变化范围,有效提高了阻尼器的出力且实现分级递进式抗冲耗能的优良效果;在桥墩防撞装置中应用可实现半主动式防撞耗能。理论与有限元仿真结果基本吻合,证明了阻尼器设计的合理性。

    Abstract:

    : In order to better protect the safety of bridge piers and ships, a step-by-step progressive high energy consumption anti-collision magnetorheological damper for bridge piers was designed for the problems of passive energy dissipation, poor dynamic response and anti-collision energy dissipation, and limited adaptability of the device. The results show that: the structural parameters of the damper are established through the establishment of a mechanical model; the structural strength and magnetic circuit are analyzed using finite elements, and the strength of the damper structural components and the magnetic circuit design meet the requirements; three pistons are set up in the cylinder barrel, which can work together to divide the energy dissipation of the damper into three phases under different crash depth displacements, and the stiffness of the device is increased, which effectively improves the force of the damper and achieves the graded progressive energy dissipation of the device. The excellent effect of progressive impact energy dissipation can be realized by applying it in the bridge pier collision avoidance device, which can realize semi-active collision avoidance energy dissipation. The theoretical and finite element simulation results basically coincide with each other, proving the rationality of the damper design.

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孟壮,于国军,何骏,等. 逐级递进式高耗能抗撞磁流变阻尼器设计[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-04-18
  • 最后修改日期:2024-05-26
  • 录用日期:2024-06-05
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