宇航学报

宇航学报 ›› 2017, Vol. 38 ›› Issue (1): 89-96.doi: 10.3873/j.issn.1000-1328.2017.01.012

• 推进技术与动力 • 上一篇    下一篇

液体运载火箭一维纵横扭一体化建模技术

唐玉花，狄文斌，刘靖华   

  1. 上海宇航系统工程研究所，上海201109
  • 收稿日期:2016-06-20 修回日期:2016-10-09 出版日期:2017-01-15 发布日期:2017-01-25

A One Dimension Longitudinal Lateral Torsional Integrated Modeling Technique for Liquid Propellant Launch Vehicle

TANG Yu hua，DI Wen bin，LIU Jing hua   

  1. Aerospace System Engineering Shanghai，Shanghai 201109，China
  • Received:2016-06-20 Revised:2016-10-09 Online:2017-01-15 Published:2017-01-25

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摘要：

提出一种新的液体运载火箭一维纵横扭一体化模型建模方法，在传统的横向和扭转振动一维梁模型基础上，融入了纵向弹簧-质量模型，并引入了多液体质量块纵向弹簧-质量模型。将该建模方法应用于某型运载火箭液体助推器，通过与试验值的比较证明：该一维纵横扭一体化模型可同时计算横向、纵向和扭转模态及耦合模态，横向、纵向和扭转频率的计算精度较高，满足工程应用要求。同时，增加液体质量块的数量可以提高纵向频率的计算精度，然而当贮箱内液体较少时，增加液体质量块的数量并不能改善计算结果的精度。

关键词: 液体运载火箭, 动特性, 一维纵横扭一体化模型, 多液体质量块

Abstract:

A new one-dimension longitudinal-lateral-torsional integrated modeling method for liquid-propellant launch vehicle is proposed in this paper, which is based on the traditional beam model and combined with the longitudinal mass-spring model. Multi-mass of liquid for the longitudinal mass-spring model is also adopted. This modeling method is applied to a liquid-propellant roll booster of a launch vehicle. By comparing with the test results, it is proved that the lateral mode, longitudinal mode, torsional mode and coupling mode of them can be achieved by the one-dimension longitudinal-lateral-torsional integrated model, and the lateral frequency, longitudinal frequency and torsional frequency from this model have high precision. Thus, this modeling method can be applied to engineering. Increasing liquid mass number improves the precision of the longitudinal frequency, while it provides no effect on the precision of the longitudinal frequency when there is less liquid in the tank.

Key words: Liquid propellant launch vehicle, Dynamic characteristic, One dimension longitudinal lateral torsional integrated model, Multi mass of liquid

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