考虑设计和实施因素的拉索阻尼器系统优化问题研究  

On damping optimization of stay cable-damper system in consideration of design and implementation factors

作　　者：淡丹辉[1] 陈艳阳 肖容[1] 

机构地区：[1]同济大学桥梁工程系,上海200092 [2]河南省交通规划勘察设计院有限责任公司,河南郑州450052

出　　处：《振动工程学报》2014年第2期246-254,共9页Journal of Vibration Engineering

基　　金："十二五"国家科技支撑计划课题(2012BAJ11B01);国家自然科学基金资助项目(50978196);国家重点实验室自主资助项目(SLDRCE09-D-01);中央高校基本科研业务费专项资金;国家气象局气象行业科研专项经费(201306102)联合资助项目

摘　　要：研究了考虑设计和施工过程因素影响的拉索阻尼器系统的优化设计问题。针对两端固结和具有一定抗弯刚度的张紧索-阻尼模型的频率超越方程,给出了基于Steffensen不动点迭代法的方程数值求解方法。根据实际工程中拉索阻尼器的设计和实施顺序特点,利用上述方程数值求根方法,研究了拉索设计定型后的两种可调因素(外置阻尼器的阻尼系数和拉索索力)影响下的拉索-阻尼器系统前10阶模态频率和阻尼比的变化规律。研究表明,这两个因素对系统模态阻尼比的影响比对模态频率的影响更显著,均可成为拉索阻尼器优化设计参数。在此基础上,讨论了并建议了系统级的阻尼器优化设计技术路线。As to the transcendental frequency equations of stay cable-damper system in consideration of double clamped end boundary conditions and flexural rigidity, a numerical equation solution based on Steffensen stable point iterative methods are present in this paper. According to the distinct characteristics in phase of design and implementation of the real cable-damper system, the influence of damping coefficient induced by external dampers and the cable tension on first 10 orders of modal frequencies and damping ratios are investigated by resolving the equations with aforementioned method. It is showed that, these two factors affect the modal damping ratios of stay cable-damper system more marked than modal frequencies, and both of them can service as the design variables in phase of design and implementation of real stay cable-damper system. Further discussion and proposal on the roadmap of systemic level optimal design of stay cable-damper is conduced based on results obtain this paper.

关 键 词：拉索 阻尼器 阻尼系数 动力特性 优化设计 

分 类 号：TU352[建筑科学—结构工程] TU311.3