Launch Vehicle Load Calculation And Common Software To Achieve

The forces of a roket are the internal forces on some key cross sections. They include axis force, shearing force and bending moment. These forces are caused by all kinds of external loads such as propulsion of engines x aerodynamic loads > wind loads and operational forces in transportation, erection and tricing. The forces of a rocket can divided into static forces and dynamic forces. The former are caused by constant external loads while the latter result from the vibration of the rocket's body induced by vertiginous loads. It is neccessary to calculate the inrenal forces of a rocket in order to analyse its structural intensity. The main achievements in this paper are summarized as follows.Firstly, the analysis models of rocket static forces are established, and the calculating formulae are derived detailedly. These static forces include operational static forces, flighting static forces, internal pressure of tanks, pressure dispersion of satellite cover and empennage forces.Secondly, the analysis models and formulae of rocketdynamic forces are discussed . These dynamic forces include axial dynamic forces, transverse dynamic forces and dynamic forces induced by wind loads.Thirdly, the analysis models and formulae of liquid sloshing force are given. The sloshing force is a kind of very complex force. The models and formulae in this paper are simplified.Finally, a software, which can be used to calculate forces mentioned above, is designed and developed. The software is suitable to caculate the internal forces of all kinds of launching vehicles serving in our country.