Lock-up装置的作用机理与分析模型  

Mechanism and analysis model for a lock-up device

作　　者：夏修身[1] 崔靓波 李建中[2] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]同济大学土木工程学院,上海200092

出　　处：《哈尔滨工程大学学报》2014年第12期1497-1502,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51368033);长江学者和创新团队发展计划资助项目(IRT1139)

摘　　要：为探讨Lock-up装置的分析模型,介绍了其构造、阐述了其作用机理,给出了Lock-up装置阻尼力的力学模型并提出了相应的数值模拟方法。基于某铁路桥梁,建立全桥有限空间模型,采用文中提出的模拟方法进行了Lock-up装置的减震性能分析,通过与常用的刚性连杆或主从约束模拟方法的比较,明确了刚性连杆模拟方法的适用条件。结果表明,Lock-up装置的地震作用过程比较复杂,当Lock-up装置能够激发出极大的阻尼力时,文中的模拟方法与常用的刚性连杆或主从约束模拟方法结果非常接近,通常情况按刚性连杆或主从约束模拟方法得到的结果偏大。The configurations and mechanism of a lock-up device （ LUD） are presented for investigating its analyti-cal model.Mechanical model of damping force for LUD is given, and the corresponding numerical simulation meth-od is proposed.Based on a railway bridge, the finite element model of the bridge is established.The seismic per-formance analysis is performed by using the above-mentioned simulation method for LUD.Applicable conditions for rigid rods or master-slave constraints method are defined by comparing with the common methods such as rigid rods or master-slave constraints.The results showed that the seismic process of LUD is quite complicated.When the LUD can inspire great damping force, the seismic results by the simulation method proposed in this paper are very close to the conventional rigid rods or master-slave constraints.Usually, the results obtained from rigid rods or master-slave constraints are too large.

关 键 词：LOCK-UP装置 分析模型 地震反应 阻尼力 桥梁 

分 类 号：U442[建筑科学—桥梁与隧道工程]