不同锚泊方式悬浮隧道在随机波作用下的动力响应试验

Experimental Investigation for Dynamic Response of Submerged Floating Tunnel with Different Mooring Styles under Random Waves

为研究不同锚泊方式悬浮隧道在随机波作用下的动力响应,设计对应的节段模型试验,分析考虑随机波作用的3种锚泊方式悬浮隧道的动力特性。根据相似准则,考虑波流水槽的尺寸,设计几何比尺为1∶150的物理模型试验。将数值模拟结果与试验结果相对比,验证试验结果的准确性和可靠性。开展不同工况下的模型试验,分析随机波作用下3种典型锚泊方式悬浮隧道管体结构的横荡、垂荡和横摇运动响应,以及锚索的受力情况。研究结果表明:锚泊方式1的抑振能力最差,锚索缆力最大,安全性最差;锚泊方式2在垂荡方向上具有较好的抑振能力,锚索缆力比锚泊方式1小;锚泊方式3在横荡、纵荡、横摇运动响应和锚索缆力方面的表现均较佳,安全性更好。该研究可供悬浮隧道工程及其他类似工程的锚泊设计提供参考。

To analyze the dynamic responses of submerged floating tunnel with different mooring styles under random waves, the corresponding segmental model test is designed and the analysis of dynamic characteristics of submerged floating tunnel with three mooring styles considering the effect of the random waves is carried out in the test. According to the similarity criterion and the dimensions of the wave-current flume, the 1:150 scaled physical model test is designed. The results of the numerical simulation are compared with that of test simulation,which verifies the accuracy and the reliability of the test results. Model tests under different working conditions are carried out, and the sway, heave and roll motion responses of the tube and the cable force of the submerged floating tunnel(SFT) with three typical mooring styles considering random waves are investigated. The results show that the mooring style 1 has the worst vibration suppression ability, the largest cable force, and the worst security. The mooring style 2 shows better vibration suppression ability in heave direction, and the cable force is smaller than that of mooring style 1. The mooring style 3 has better performance in sway, heave, and roll motion responses of the tube and the force of cables, with better security. It can provide technical guidance for the mooring design of submerged floating tunnel and other similar projects.