高压逃生艇运动与乘员晕船率分析

高压逃生艇是饱和潜水系统中为潜水员配备的专用高气压紧急撤离设备，相比常压下的全封闭救生艇，具有大吃水、高重心和对乘坐舒适性的要求较高等特征。基于三维势流理论计算分析高压逃生艇的运动响应，在此基础上分析乘员晕船问题，得到艇体运动和艇员晕船率与航速和波浪条件之间的影响关系。研究发现：艇体垂荡、横摇和纵摇并不总是随航速的增加而加剧；艇体横摇和纵摇的峰值对应的遭遇周期分别为9 s和3 s；波浪从艇尾入射时，艇体的垂荡和纵摇相比波浪从艇首入射时更剧烈；艇上乘员的晕船率与波浪条件和航速相关，艇尾处的乘员晕船率最高。

Analysis on Motions and MSI of Occupants in a Hyperbaric Lifeboat on Waves

A self-propelled hyperbaric lifeboat (SPHL) is a hyperbaric evacuation vessel specially designed for divers in saturation diving systems. Compared with other fully enclosed lifeboats, a SPHL has larger draught, higher center of gravity and higher requirements for comfort. Based on three-dimensional potential theory, the motions of SPHL and the seasickness problem are analyzed. The influence of speed and wave conditions on motions and seasickness are obtained. The research found that heave, roll and pitch are not always increasing with the increase of the speed. The encounter periods of roll and pitch are 9s and 3s respectively. When the wave is incident from the stern, heave and pitch are more severe than that from the bow. MSI of occupants are related to speed and wave conditions. The highest MSI occurs at the positions of stern crews.