Abstract
This paper provides the formulation used for studing the cold and hot separating stages of a multistage launch vehicle. Monte Carlo simulation is employed to account for the off nominal design parameters of the bodies undergoing separation to evaluate the risk of failure for the separation event. All disturbances, effect of dynamic unbalance, residual thrust, separation disturbance caused by the separation mechanism and misalignment in cold and hot separation are analyzed to find out nonoccurrence of collision between the separation bodies. The results indicate that the current design satisfies the separation requirements.
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Abbreviations
- a 0 :
-
acceleration of coordinate system (m/s2)
- u, υ, w :
-
components of body linear velocity along x, y and z axes (m/s)
- p, q, r :
-
components of body angular velocity about x, y, z axes ((°)/s)
- C :
-
coning angle (°)
- u*:
-
critical velocity (m/s)
- ρ 1 :
-
gas density (kg/m3)
- T :
-
lateral angular tip-off rate ((°)/s)
- m :
-
mass(kg)
- M a :
-
matchnumber
- P k :
-
pressure in vessel (Pa)
- P a :
-
pressure in nozzle (Pa)
- P 02 :
-
pressure between shock and first stage (Pa)
- P M :
-
pressure between two stages (Pa)
- I xy , I xz , I yz :
-
products of inertia in yaw, roll and pitch planes (kg · m2)
- r :
-
radius of stage one (m)
- R 1,2 :
-
relative distance between CG (center of gravity) of stages 1,2 and coordinate system (m)
- I x , I y , I z :
-
roll, pitch and yaw moments of inertial, respectively (kg · m2)
- S a :
-
surface of nozzle (m2)
- T k :
-
temperature in vessel (K)
- T M :
-
temperature between two stages (K)
- t :
-
time (s)
- u 1 :
-
velocity (m/s)
- V M :
-
volume of space between two stages (m3)
- ψ, γ, φ :
-
yaw, roll and pitch angles (°).
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Roshanian, J., Talebi, M. Monte Carlo simulation of stage separation dynamics of a multistage launch vehicle. Appl. Math. Mech.-Engl. Ed. 29, 1411–1426 (2008). https://doi.org/10.1007/s10483-008-1103-z
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DOI: https://doi.org/10.1007/s10483-008-1103-z