Abstract
In order to analyse the effect of ellipsoidal modulus and internal pressure on bearing capacity of thrust-bearing aft dome, we obtain the stress and strain distribution and bearing capacity of 1.6, 1.4 and 1.0 modulus ellipsoidal aft dome under 0MPa~0.98MPa internal pressure and engine thrust by finite element method. We find as the modulus decreases, the bearing capacity of the ellipsoidal aft dome increases, and as internal pressure decreases, within the engineering range (0~0.98MPa), the bearing capacity increases. The conclusion can provide a guidance for the design of thrust-bearing aft dome.
Highlights
The main structural forms of liquid rocket engine thrust transmission are of rods, beam, shell and load-bearing aft dome of tank, etc
Saturn V S-IVB stage transmits thrust to aft dome through a conical shell [2,3], as shown in figure 1
The Long March 4 third stage transmits the thrust to the aft dome of tank through a cylindrical shell frame called the engine cabin [4-6],as shown in figure 2.The upper stage Centaur transmits all thrust through a thrust barrel welded to the aft dome [2,7], as shown in figure 3
Summary
The main structural forms of liquid rocket engine thrust transmission are of rods, beam, shell and load-bearing aft dome of tank, etc. [1]. The main structural forms of liquid rocket engine thrust transmission are of rods, beam, shell and load-bearing aft dome of tank, etc. The form of load-bearing aft dome means engine transmits its thrust directly or by a small frame to the aft dome. This form can obviously reduce the size of frame and even cancel the frame to reduce the mass of the structure, which is of great significance to the lightweight design of the rocket structure. There is little literature to discuss the Effect of the parameter designed on bearing capacity of Thrust-Bearing Aft Dome.
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