由抛助推器故障引起非对称条件下的运载火箭气动伺服弹性分析模型

A Model for Aeroservoelastic Analysis of Large Carrier Rocket for Non-Symmetrical Conditions Produced during Booster-Dropping Process

在运载火箭抛助推器故障造成结构刚度、质量分布和气动力分布不对称条件下 ,建立了运载火箭气动伺服弹性分析的数学模型 ,以及非对称情况运载火箭结构弹性振动特性分析有限单元法模型 ,并求解了其频率和振型。应用

To our best knowledge, there does not exist a model for aeroservoelastic analysis of large carrier rocket when occurrence of fault during process of dropping boosters produces non symmetries in one, two, or all three of the following distributions: (1)structural rigidity, (2)mass, (3)aerodynamic pressure. Our aim is to establish such a model and to give methods for completing some calculations needed for aeroservoelastic analysis. Section 1 discusses in detail the establishment of such a model. Section 2 gives a method for calculating the elastic vibration characteristics of rocket structure, which include frequencies and modal shapes when non symmetrical distributions of structural rigidity and/or mass exist. Section 3 gives a method for calculating non symmetrical aerodynamic pressure distribution.