波浪作用下沉管隧道管段双驳船沉放过程的频域响应

基于线性波理论，应用三维分布源法求解边界积分方程，计算了波浪作用下双驳船施工沉放的沉管隧道管段沉放过程中的波浪荷载及频域运动响应。计算中忽略了驳船本身的运动对沉管运动响应以及缆绳受力的影响，缆绳作用力由静力学方法计算。计算结果表明，沉管受到的波浪荷载在靠近水面的位置较大，并随着沉管沉放深度的增加而减小；随着波浪周期的增大，沉管受到的波浪荷载先增大而后减小；沉管的运动响应一般在离水面近的位置较大，并随着沉放深度的增加而减小。

Frequency response of twin-barge immersing tunnel element under wave actions

The linear wave diffraction theory and the three-dimensional source distribution method are applied to calculate the wave loads and motion responses of twin-barge immersing tunnel element under wave actions in frequency domain. The influences, which the movements of two barges over the sea have on the motion responses of immersed tunnel and tensions of cable lines, are ignored. The cable lines tensions are computed by static method not considering dynamic effect. The results show that the wave loads acting on immersed tunnel element are relatively large near the water surface, and they decrease with the increase of the immersing depth of tunnel element and first increase but then decrease with increasing the wave period. And the motion responses of immersed tunnel element are also in a general way large near the water surface, decreasing as the immersing depth increases.