排序方式: 共有35条查询结果,搜索用时 78 毫秒
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洞庭湖大桥拉索风雨振控制新技术 总被引:5,自引:0,他引:5
随着大跨径斜拉桥的不断建设,斜拉索的减振特别是风雨振的控制已成为该类桥梁急需解决的关键问题之一。岳阳洞庭湖大桥建成通车后已发生多次强烈风雨振,在对应用磁流变智能阻尼减振技术控制风雨振研究的基础上,全面评估了该技术控制拉索振动的实际效果,证明该阻尼器是拉索风雨振控制的有效手段。岳阳洞庭湖大桥全桥安装磁流变阴尼器后,加速度响应降低为原加速度的1/20-1/30。 相似文献
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天兴洲公铁两用斜拉桥主梁纵向地震、列车制动及行车移动荷载响应的混合控制 总被引:3,自引:1,他引:2
针对天兴洲公铁两用斜拉桥提出"MR阻尼器 液体粘滞阻尼器"的混合控制方案,并建立了对该桥主梁纵向地震、列车制动和行车移动荷载响应混合控制的基本方程、控制策略和仿真分析方法,分析结果表明采用该混合控制方案能有效地抑制大桥主梁纵向地震、列车制动及行车移动荷载的振动响应. 相似文献
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针对设计制造的基于混合工作模式的单级磁路与双级磁路磁流变减振器,在伺服试验台上对所设计制造的减振器进行了试验研究。分析了两种结构的磁流变减振器在不同激励电流的作用下示功特性曲线的特点及速度特性曲线特点。试验表明:双级磁路活塞减振器阻尼力变化范围更大,比同样结构的单级磁路活塞减振器性能更为优越,为磁流变减振器的进一步优化设计提供了依据。 相似文献
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磁流变阻尼器在洪山大桥拉索减振中的应用 总被引:5,自引:0,他引:5
介绍了一种新型磁流变(MR)阻尼器——永磁调节装配式磁流变阻尼器在长沙洪山大桥拉索减振的应用及试验研究情况,得到了安装阻尼器前后拉索的动力特性,结果表明这种新型磁流变阻尼器能有效地提高拉索的模态阻尼比,抑制拉索的大幅振动。由于该阻尼器无需供电,装配简单,维修方便,与其他的磁流变阻尼器相比,具有较高的推广应用价值。 相似文献
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将船舶作为面向对象,合理引入MR减震器技术,形成专用于船舶中的智能抗冲击隔离器,不仅可以抗冲击,同样能够达到低频减振的目的。基于此,本文将船舶作为面向对象,重点阐述MR减震器相关技术。 相似文献
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Xiukun Wei Ming Zhu Limin Jia 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2016,54(7):982-1003
The high-speed train has achieved great progress in the last decades. It is one of the most important modes of transportation between cities. With the rapid development of the high-speed train, its safety issue is paid much more attention than ever before. To improve the stability of the vehicle with high speed, extra dampers (i.e. anti-hunting damper) are used in the traditional bogies with passive suspension system. However, the curving performance of the vehicle is undermined due to the extra lateral force generated by the dampers. The active suspension systems proposed in the last decades attempt to solve the vehicle steering issue. However, the active suspension systems need extra actuators driven by electrical power or hydraulic power. There are some implementation and even safety issues which are not easy to be overcome. In this paper, an innovative semi-active controlled lateral suspension system for railway vehicles is proposed. Four magnetorheological fluid dampers are fixed to the primary suspension system of each bogie. They are controlled by online controllers for enhancing the running stability on the straight track line on the one hand and further improving the curving performance by controlling the damper force on the other hand. Two control strategies are proposed in the light of the pure rolling concept. The effectiveness of the proposed strategies is demonstrated by SIMPACK and Matlab co-simulation for a full railway vehicle with two conventional bogies. 相似文献