基于过饱和安全压差的氦氧饱和潜水减压方案的计算方法

An calculating method for heliox saturation decompression table based on safe excess pressure

目的建立一种用于氦氧饱和潜水减压方案计算的数学模型。方法在Haldane理论基础上,分析组织内气泡界面上的受力平衡关系,确定过饱和安全压差控制下的每站安全停留时间,建立氦氧饱和潜水减压方案的计算方法。结果研究所得的减压方案与英国皇家海军氦氧饱和潜水减压方案相比脱饱和效率更高,与美国海军氦氧饱和潜水减压方案相比减压时间分布更合理、向更大深度延伸使用的效率更好。经60余人次饱和潜水(300 msw以深8人次)验证无减压病发生。结论该研究建立的减压数学模型具有物理意义上的确定性,在减压时间分布、大深度延伸性和整体安全性上存在优势。

Objective To build a mathematic model for calculating the heliox saturation diving decompression table.Methods Based on the Haldane’s gas theory,this study analyzed the equilibrium condition of forces on the surface of bubbles in tissues to deduce the safety residence time of each decompression stop controlled by the safe excess pressure.Then,a calculating method of heliox saturation diving decompression table was obtained.Results The decompression table calculated in this study has a higher desaturation efficiency compared with the British Royal Navy’s table;and it has a more reasonable decompression time distribution and better depth extrapolation compared with the US navy’s table.This table has been verified by more than 60 man-time(8 person times deeper than 300 msw)heliox saturation diving,and no decompression sickness occurred.Conclusion The mathematic decompression model built in this study has the significance of determinacy in physics.It has many advantages in time distribution,depth extrapolation,and overall safety.