摘要
为了增加重载飞艇的载重能力,在满足结构强度要求下飞艇上的贮水水箱需要采用薄壁结构、轻质材料等方法来减轻重量。水箱在空中受到风载荷或其他载荷的作用,会导致水箱中的液体发生晃动,水箱在液体晃动和外部载荷共同作用下,可能会遭到破坏。考虑流固耦合作用对水箱结构的影响,分别从液体小幅晃动和大幅晃动两种情况对水箱动力响应进行研究。对于大幅晃动的情况,以试验所得风载荷加速度函数作为激励,利用计算流体动力学(CFD)方法进行仿真分析。分析结果表明,小幅晃动条件下,即使水箱发生共振,其结构也不会遭到破坏;大幅晃动条件下,1.3 mm以下壁厚钢材料水箱和2.1 mm以下壁厚铝合金材料水箱结构会遭到破坏。该分析结果可为水箱部分设计参数的确定提供参考依据。
In order to increase the carrying capacity of heavy duty airships,thin walled structures and lightweight materials are required to reduce the weight of the water tanks on the airship while meeting the requirements of structural strength.The water tank is affected by wind load or other loads in the air,which will cause the liquid in the water tank to slosh,so the water tank may be damaged by the liquid sloshing and external load.Considering the influence of fluid structure interaction on the structure of water tank,the dynamic response of water tank was studied from two cases of small liquid sloshing and large liquid sloshing.For the case of large sloshing,the acceleration function of wind load obtained from the test was used as the excitation,and the computational fluid dynamics(CFD)method was used for simulation analysis.The results show that the structure of the water tank can not be damaged even if the tank resonates under the condition of small sloshing,and that the structure of steel water tank with wall thickness less than 1.3 mm and aluminum alloy water tank with wall thickness less than 2.1 mm can be damaged under the condition of large sloshing.The analysis results can provide reference for determining some design parameters of water tank.
作者
龙飞
杨天祥
万强
周志鹏
LONG Fei;YANG Tian-xiang;WAN Qiang;ZHOU Zhi-peng(China Special Vehicle Research Insiute,Jingmen 448035,China;Wuchang Shouyi Univernity,Wuhan 430064,China)
出处
《测控技术》
2020年第4期108-112,共5页
Measurement & Control Technology
基金
国家重点研发计划资助项目(2016YFE0114000)。
关键词
液体晃动
飞艇水箱
动力响应
流固耦合
liquid sloshing
airship water tank
dynamic response
fluid-structure interaction
作者简介
龙飞(1982-),男,硕士,高级工程师,主要研究方向为飞行器总体设计。
