大型集装箱起重机翘翘梁式减震方法研究

Vibration Control of Container Crane based on Seesaw Mechanism

提出了一种适用于大型岸桥减震的翘翘梁减震装置,通过建立岸桥无控结构和安装该减震装置的数值模型,采用非线性时程分析方法,分析了结构的地震响应,并与斜撑式减震方法进行了对比。研究结果表明,翘翘梁式减震装置能明显提高岸桥结构的抗震性能,减小岸桥结构的位移响应;相比其他减震方法而言,翘翘梁式减震装置对岸桥结构的振动控制效果最为明显,其减震率可以达到61%。

In this paper ,a new vibration control device with seesaw beam structure for container crane is proposed.The numerical models of container crane without and with damping device are established,and nonlinear time histor^^ analy-sis is used to analyze seismic response of a container crane. Besides this system,a diagonal-brace-AFD system is studied for comparison. Simulation results show that the seesaw beam type damping device can obviously improve the aseismatic per- lormance of the quayside bridge and significantly reduce the structural responses. Compared with other damping methods, the seesaw beam type shock absorber is the most effective for controlling the quayside bridge structure vibration. The shock absorption rate can reach up to 61%.