抗冰平台TMD吸振实验装置设计

Design of TMD vibration absorption experimental device for ice-resistant platform

在多数结冰海域,海冰对海洋资源开发的威胁,远比波浪和风的影响大得多。海冰作用在导管架结构引起冰激振动,危害了平台主体结构与上部作业人员的安全。为此,以渤海导管架抗冰平台为例,开发了室内调谐质量阻尼器(TMD)吸振实验装置,通过动力子结构控制实验系统,将虚拟的导管架抗冰平台与TMD吸振实验装置联系起来,实现了TMD的大比尺实验设计,并通过实测的冰力时程数据,验证了TMD质量比为2%的减振效果。该TMD吸振实验装置,不仅可以模拟TMD在不同的质量比、阻尼比以及频率比下抗冰平台的减振效果,也可以模拟建筑结构受风振或地震作用时安装TMD的减振性能,为TMD吸振问题的深入研究提供了基础。

In most frozen sea areas,the threat of sea ice to the development of marine resources is far greater than the impact of waves and winds.Sea ice acting on jacket structure causes vibration,which endangers the safety of main structure and upper operators of the platform.For this reason,taking Bohai jacket platform as an example,a tuned mass damper(TMD)vibration absorption experimental device was developed.Through the dynamic substructure control experimental system,the virtual ice resistant platform of the jacket was connected with the TMD vibration absorption experimental device,the large-scale experimental design of TMD was realized.Then,the vibration reduction with the TMD mass ratio of 2%was verified by the measured ice force time history data.So that,this TMD vibration absorption experimental device,can not only simulate the vibration reduction effect of the ice-resistant platform under different mass ratio,damping ratio and frequency ratio,but can also simulate the vibration reduction performance of TMD installed in the building structure under the wind or earthquake action,which provides the foundation for the further study of the TMD vibration absorption problem.