The mathematical model of reentry maneuvering trajectory is established. The fitting expression of aerodynamic coefficient function on velocity, attack of Angle and altitude is presented.
A new concept on the displacement operator for beam unit is established, and a method of calculating the deflection Angle of beam unit is then provided.
本文建立了一个梁单元位移算子的新概念，并提供一种梁平面弯曲变形的梁单元位移算子求变形的计算方法。
3
At unstable state the formula of calculating unstable time using tangent Angle is established.