摘要
分别对串联裸管和带三控制杆串联立管进行室内水槽试验,使用DHDAS软件采集立管横向振幅和频率数据,分析不同立管间距对三控制杆涡激振动抑制效果的影响。结果表明,下游立管横向振动较上游立管弱;对于上游立管,随着间距的增大,控制杆的抑制效果逐渐平缓降低,下游立管则先增大后减小;串联立管间距为5~6倍管径时三控制杆抑制效果最佳。
Tandem bare risers and tandem risers with three-control-rods model tests were carried out in water flume. DHDAS was used to collect data of lateral amplitude and the frequency of transverse oscillation,to investigate the influence of gap between risers upon the VIV suppression. The results showed that the lateral amplitude of upstream riser is always larger than downstream riser; for upstream riser,the inhibition effect is getting smaller with the increase of spacing,while the downstream riser presents increasing at beginning but then decreasing. The suppression effect gets the most obvious when the space is up to 5 D ~ 6 D.
出处
《船海工程》
北大核心
2018年第1期124-128,共5页
Ship & Ocean Engineering
基金
国家重点研发计划资助(2016YFC0303800)
国家自然科学基金(51579245)
关键词
三控制杆
串联立管
涡激振动
横向振幅
three-control-rods
tandem risers
VIV
transverse amplitude
