CAJ | 학술논문

采用非线性滞回阻尼器构造一个斜拉索-非线性阻尼器系统,并利用磁滞系统的耗能特性,抑制斜拉索的振动.按照1:12的缩尺比,在试验室中建立了一条原型为143m长斜拉索的试验模型,首先对没有阻尼器的斜拉索进行了振动控制试验研究,然后将非线性滞回阻尼器安装在靠近张拉端的附近,在另一端施加激励,对在不同阻尼器位置及不同激振力幅值下的斜拉索的动力响应进行试验研究,得到了对振动控制设计有较高应用价值的传递函数和等效阻尼比.
채용비선성체회조니기구조일개사랍색-비선성조니기계통,병이용자체계통적모능특성,억제사랍색적진동.안조1:12적축척비,재시험실중건립료일조원형위143m장사랍색적시험모형,수선대몰유조니기적사랍색진행료진동공제시험연구,연후장비선성체회조니기안장재고근장랍단적부근,재령일단시가격려,대재불동조니기위치급불동격진력폭치하적사랍색적동력향응진행시험연구,득도료대진동공제설계유교고응용개치적전체함수화등효조니비.
A non-linear hysteretic isolator-cable system is set up to suppress the cable vibration, according to the energy dissipation characteristics of hysteretic system. A 12m-long stay cable specimen, which is a 1 ： 12 scale model of a 143m-long prototype cable in an actual cable structure, is established for the experimental study. Firstly, the modal testing on the pure cable without damper is performed to identify the actual modal properties of the cable. Then a series of dynamic tests are conducted on the cable incorporated with a small-size non-linear hysteretic isolator near the lower anchorage. By exciting the cable transversely at a point near the upper anchorage, the nonlinear frequency response curves of the cable-damper system under different excitation force amplitudes and three installation positions of the damper are obtained experimentally. The resonant frequencies and the equivalent viscous damping ratios of the nonlinear system under different excitation levels are also identified, which are useful for the cable vibration control。