可控式TMD-TLD混合调频系统对海洋平台的减震控制策略

为保证调谐类阻尼系统在海洋平台频率发生偏移时的减震效果,提出可控式TMD-TLD混合调频系统(control-lable TMD-TLD hybrid system,CTTHS),并以被动控制的形式研究了该系统应对海洋平台频率发生偏移时的减震控制策略.介绍了系统中各参数的设置方法,推导了平台-混合系统的运动方程.模拟结果显示,在海洋平台结构频率减小或增大时,CTTHS相对于普通TMD的减震效果最大增幅分别达到28%与6%,同时,CTTHS能够在较宽的频率范围内进行结构减震控制,具有比普通TMD更优的控制性能及更强的鲁棒性.

Vibration control strategies of controllable TMD-TLD hybrid system for offshore platforms

A controllable TMD-TLD hybrid system(CTTHS) was developed to guarantee the control effectiveness of tuned type damper system for offshore platforms when frequency excursion happening,and the control strategies were studied in the passive form to handle the frequency excursion of offshore platforms.Parameters setting of the system was introduced and the equation of motion of the platform-hybrid system was also derived.Simulation results show that the vibration control effectiveness of CTTHS is improved a lot,and the maximal vibration decreasing ratio reaches up to 28% or 6% compared with ordinary TMD when the frequency of the platform decreases or increases respectively.Moreover,CTTHS can be used in structural aseismic control in a wide frequency range,and has more excellent control performance and stronger robustness than that of TMD.