水下滑翔机航行过程浮力变化分析  

Analysis of Buoyancy Variation in Navigation of Underwater Glider

作　　者：董石榴 张建星 彭宇轩 傅晓云[1] 杨钢[1] DONG Shiliu;ZHANG Jianxing;PENG Yuxuan;FU Xiaoyun;YANG Gang(School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学机械科学与工程学院,武汉430074

出　　处：《机械科学与技术》2024年第12期2009-2015,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家重点研究发展计划(2016YFC0301204)。

摘　　要：本文推导出水下滑翔机下潜至某深度所需最小浮力调节量与海水密度和自身变形引起的浮力变化量之间的关系;对下潜过程进行受力分析,导出滑翔速度与净浮力的关系;通过海试数据得到HUST-1号水下滑翔机下潜至1000 m的浮力变化量,计算得到耐压壳体变形量。考虑海水压力,利用Workbench仿真得到下潜至1000 m处的压缩变形量,与海试结果相差31.7%,考虑海水温度仿真得到温差变化量,两者之和与海试数据误差为0.1%,说明只考虑压力对耐压壳体的影响不准确,温度影响也必须考虑,也说明用数值仿真方法计算水下滑翔机变形是可行的。基于该数值仿真方法,在0~1200 m深度内,考虑海水密度、压力和温度对HUST-2号水下滑翔机下潜过程浮力变化进行分析,潜至0~200 m内所需的最小浮力调节量变化很大,超过500 mL,而在200~1200 m内,所需的最小浮力调节量变化趋势较缓,仅为85 mL左右。该款HUST-2号水下滑翔机进行海试时对于不同的下潜深度,根据本文计算的最小浮力调节量,可以节省测试时间和成本。In this paper,the relationship between the minimum buoyancy adjustment required for underwater glider to dive to a certain depth and the buoyancy change caused by seawater density and self-deformation is deduced;the force analysis of the diving process is carried out,and the relationship between the gliding speed and the net buoyancy is derived.Through the sea trial data,the buoyancy change of the HUST-1 underwater glider when it dived to 1000 m was obtained,and the deformation of the pressure shell was calculated.Considering the seawater pressure,the compressive deformation at 1000 m is obtained with Workbench simulation,which is 31.7%different from the sea test result.Considering the seawater temperature simulation,the change in temperature difference is obtained.It is inaccurate to consider the influence of the pressure on the pressure shell,and the influence of the temperature must also be considered,which also shows that it is feasible to calculate the deformation of the underwater glider with the numerical simulation.Based on this numerical simulation method,in the depth of 0~1200 m,considering the density,pressure and temperature of seawater,the change in buoyancy in the divingof HUST-2 underwater glider is analyzed,and the minimum buoyancy adjustment required for diving to 0~200 m changes.It is very large,more than 500 mL,and within 200~1200 m,the minimum required buoyancy adjustment amount changes slowly,only about 85 mL.Afterwards,when the HUST-2 underwater glider conducts sea trials for different diving depths,the minimum buoyancy adjustment calculated in this paper can save testing time and cost.

关 键 词：水下滑翔机 浮力调节量 滑翔速度 净浮力 耐压壳体 数值仿真 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]