在水下大型结构物吊装下放的过程中，当船-缆-体多体耦合系统遭遇非线性环境载荷，发生大幅运动时，吊装系统的缆绳会出现从松弛到张紧的快速变化，同时结构物的姿态和加速度也很难控制，可能危及系统的安全作业和精密仪器的寿命。本文针对国内首座海底数据舱，通过全耦合的动态时域模拟了数据舱的下水过程，考虑了船舶运动、风、浪、流以及波浪抨击效应，尤其是刚入水时波浪对数据舱的抨击影响，并对波浪抨击的关键参数进行了敏感性分析；准确预报了数据舱入水时的加速度和6个自由度的运动，以及数据舱的入水姿态，保证了数据中心的顺利入水。研究结果可为后续海底数据舱的设计与海上安装提供一定的理论和技术参考。

In the process of subsea manifold hoisting and lowering， when the ship-cable-body multi-body coupling system moves greatly due to strong nonlinear environmental load， the cables of the hoisting system will change rapidly from slack to tensioning， resulting in the instantaneous surge of mooring impact tension， which may endanger the safe operation of the system. This article simulates the launching process of the underwater data center through fully coupled dynamic time-domain simulation. It considers the motion of ships and the effects of wind， waves， currents， and wave slamming， especially the impact of waves on the underwater data center when it first enters the water. Sensitivity analysis is conducted on the key parameters of wave slamming， accurately predicting the acceleration and six degrees of freedom of the data center when it enters the water， ensuring the smooth and safe entry of the underwater data center into the water. The research results provide certain theoretical and technical references for the design and offshore installation of underwater data centers in the future.