摘要
提出了飞行器舱门密封载荷的解耦求解方法,求解过程分为2步:首先把密封条受力情况简化为平面应变状态,求出单位长度密封条压缩需要的力;然后在舱门铰链处定义转动副并约束转动角位移,同时在密封位置施加与单位长度密封压缩力等效的压强,从而得到铰链的支反力矩,即为舱门密封载荷。该方法避开了传统三维有限元分析方法难建模、难约束、难收敛的问题,提高了舱门密封载荷计算的效率。
A decoupled method is presented for determining seal load in this paper.Firstly,the strain state of sealing strip is simplified to plane strain state and the compression force per unit length of sealing strip is gotten.Secondly,constraint of the revolute freedom of the revolute pair defined at the position of the hatch door hinge is applied and pressure which is equivalent to the compression force per unit length of sealing strip is applied at the seal position simultaneously,then the reacting moment of the seal load is obtained.The engineering case shows that the difficulties of traditional FEM are avoided by using this method and it can be easily used by ordinary engineers.
作者
郭爱民
刘维玮
彭波
吴迪
尹进
Guo Ai-min;Liu Wei-wei;Peng Bo;Wu Di;Yin Jin(R&D Center,China Academy of Launch Vehicle Technology,Beijing,100076)
出处
《导弹与航天运载技术》
CSCD
北大核心
2018年第4期18-21,共4页
Missiles and Space Vehicles
基金
国防基础科研项目(JCKY2016601B001)
关键词
飞行器舱门
密封载荷
密封条
有限元分析
Aircraft hatch door
Seal load
Sealing strip
Finite Element Method(FEM)
