CAJ | 학술논문

为获得新型圆周缝结构救生伞的充气性能，文章采用任意拉格朗日欧拉流固耦合方法对该救生伞进行了充气过程的数值模拟，用空投试验结果验证了该数值方法的可行性。数值结果得到了绕伞衣流场、伞衣外形、运动的动态信息，对数值结果的分析发现初始充气阶段后期流场对上部伞衣影响很大，为充气过程中上部伞衣的控制提供了依据，但是初始充气期救生伞的摆动角度小于充满期。对于结构透气量不对称设计的伞衣，不对称充气是绝对的，圆周缝会首先在结构透气量少的部位张开。结果表明，对不同的圆周缝节点设计不同的开缝力将有助于保持良好的对称充气状态，改变开缝力的设计参数将会改变圆周缝的开缝时间及圆周缝完全张开所需的时长，将达到更好的减载效果。研究结果对圆周缝型降落伞的优化设计有一定的参考作用。
위획득신형원주봉결구구생산적충기성능，문장채용임의랍격랑일구랍류고우합방법대해구생산진행료충기과정적수치모의，용공투시험결과험증료해수치방법적가행성。수치결과득도료요산의류장、산의외형、운동적동태신식，대수치결과적분석발현초시충기계단후기류장대상부산의영향흔대，위충기과정중상부산의적공제제공료의거，단시초시충기기구생산적파동각도소우충만기。대우결구투기량불대칭설계적산의，불대칭충기시절대적，원주봉회수선재결구투기량소적부위장개。결과표명，대불동적원주봉절점설계불동적개봉력장유조우보지량호적대칭충기상태，개변개봉력적설계삼수장회개변원주봉적개봉시간급원주봉완전장개소수적시장，장체도경호적감재효과。연구결과대원주봉형강락산적우화설계유일정적삼고작용。
In order to obtain the inflation performance of new rescue parachute with circle gap structure, an arbitrary Lagrangian Eulerian fluid-structure coupling method is utilized to simulate the inflation process of this rescue parachute. The feasibility of this numerical method is verified through airdrop test results. The de-tailed information such as flow field around canopy, canopy shape and movement is obtained from numerical results. The upper canopy is affected significantly by influence of flow field in the later period of initial infla-tion stage, which is the basis of upper canopy controlled in inflation process through the analysis of numerical results. The swing angle of rescue parachute in initial inflation stage is less than the angle of full inflation phase. For the asymmetrical structure ventilation canopy, the inflation is absolutely asymmetric; the circle gap will firstly open in small structure ventilation part. The above results show that different open force designs for dif-ferent circle gap nodes will be helpful to ensure good symmetric inflation. Change of open force design pa-rameters will change the time spot of open of circle gap and duration of full open of circle gap, and achieve better load reduction. These results could provide some guidance for optimization design of circle gap structure parachute.