| 牵顶伞在降落伞拉直过程中的作用 |
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| 引用本文： | 余莉,史献林,袁文明.牵顶伞在降落伞拉直过程中的作用[J].南京航空航天大学学报,2009,41(2). |
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| 作者姓名： | 余莉 史献林 袁文明 |
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| 作者单位： | 南京航空航天大学航空宇航学院,南京,210016 |
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| 摘 要： | 采用有限元方法,建立降落伞回收系统的多质点动力学模型,研究了牵顶伞在拉直过程中对主伞性能的影响.模型中将柔性大变形的伞绳、伞表、连接带离散成若干绳段,各绳段假设为质量集中在中心的质点,各质点间以阻尼弹簧连接,其运动由对应绳段的重力、气动力和张力确定.利用该模型对某批次的空投试验进行了仿真,给出了张力、速度、位移等参数的瞬态变化.经过分析表明,牵顶伞能够改善主伞张力分布,抑制伞衣项部横向摆动.
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| 关 键 词： | 牵项伞 降落伞 拉直过程 绳帆 动力学模型 |
Effects of Parachute Deployment Using Attached Apex Drogue |
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| Yu Li,Shi Xianlin,Yuan Wenming.Effects of Parachute Deployment Using Attached Apex Drogue[J].Journal of Nanjing University of Aeronautics & Astronautics,2009,41(2). |
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| Authors: | Yu Li Shi Xianlin Yuan Wenming |
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| Institution: | College of Aerospace Engineering;Nanjing University of Aeronautics & Astronautics;Nanjing;210016;China |
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| Abstract: | Based on the finite element method,the multi-mass dynamic model of a recovery parachute system is developed to study the main parachute performance using an attached apex drogue during the deployment.The large deformation flexible suspension line,the canopy and the connecting band are discreted into some nodes with their centralized mass on the centroid.Each node is modeled as a mass damping spring. The motion of each node is determined by the tension,aerodynamic force and gravity.Utilizing the model to sim... |
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| Keywords: | attached apex drogue parachute deployment line sail dynamics model |
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