论文部分内容阅读
采用质量阻尼弹簧模型分析了阻力伞拉直过程的影响因素,包括引导伞阻力面积、伞系统弹性模量以及线密度等。分析表明,在200～300km/h的放伞速度范围内,阻力伞的拉直时间和最大下落距离随放伞速度的增大而减小,而阻力伞系统的张力变化则相反;增大引导伞阻力面积或减小伞系统线密度,能明显地减小拉直时间和最大下落距离;阻力伞系统的弹性模量对拉直过程中运动轨迹的影响相对较小。放伞速度、引导伞阻力面积与阻力伞系统线密度是影响阻力伞放伞拉直过程的关键因素,该研究可为阻力伞系统工程设计提供分析依据。
The quality damping spring model was used to analyze the influencing factors of the parachute straightening process, including the area of the guided parachute, the elastic modulus of the umbrella system and the linear density. The analysis shows that in the speed range of 200 ~ 300km / h, the straightening time and the maximum falling distance of the parachute umbrella decrease with the increase of the parachute speed, while the tension of the parachute system changes in the opposite direction; Umbrella resistance area or reduce the linear density of the umbrella system, can significantly reduce the straightening time and the maximum distance; drag umbrella system elastic modulus of the trajectory during straightening relatively small. The speed of the umbrella, the area of the guiding umbrella resistance and the density of the system of the resistance umbrella are the key factors that influence the straightening process of the parachute umbrella. This research can provide the basis for the design of the parachute system engineering.