【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。更多还原

【Abstract】 The configurations and mechanism of a lock-up device( LUD) are presented for investigating its analytical model. Mechanical model of damping force for LUD is given,and the corresponding numerical simulation method is proposed. Based on a railway bridge,the finite element model of the bridge is established. The seismic performance 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.更多还原