为研究水中悬浮隧道在波浪荷载作用下管体的加速度特性，开展模型结构比尺为1∶60的两端自由椭圆形断面模型试验，并基于模型试验进行波浪荷载作用下椭圆形管段关键点加速度响应分析，讨论周期和波高对管体纵向加速度、横向加速度、竖向加速度的时程变化、变换频域和极值大小的影响。结果表明： 1)管体纵向、横向、竖向加速度时程均随波高的增大而增大，纵向加速度最大值有较大波动； 2)横向加速度时程由高频转向低频，加速度峰值有较为明显的非线性增长趋势； 3)竖向加速度表现为多周期变化，加速度时程在小周期呈现为高频多峰趋势，随着周期的增大，其峰值先增大后减小。
To investigate the acceleration characteristics of the
submerged floating tunnels(SFTs) under the action of wave load, a model test of
the free elliptical section at both ends with a scale of 1:60 is conducted.
First, the acceleration response of key points of the elliptical section under
wave load is analyzed using the model test. Next, the influence of wave period
and height on the timehistory variation, frequency domain,
and extreme values of longitudinal, transverse, and vertical acceleration of
SFT are discussed. The results are summarized as follows: (1) The timehistory of the longitudinal, transverse, and vertical acceleration
of the tube increases with increasing wave height, and the maximum value of
longitudinal acceleration fluctuates greatly. (2) The timehistory of transverse acceleration changes from high frequency to
low frequency, and the acceleration peaks show an obvious nonlinear growth
trend. (3) The vertical acceleration exhibits a multiple and periodic
variation. The timehistory of acceleration displays a
highfrequency and multipeak
in a small period, and its peak value increases initially, followed by a
decrease with increasing wave period.
