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Zhu Huailiang
Department of Mechanics,
Shanghai University,
Shanghai 200436, China
Zhang Fuxiang
School of Mechanical Engineering,
Nanjing University of Science
and Technology,
Nanjing 210094, China |
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NONLINEAR
DYNAMIC SIMULATION OF AN AXIALLY SLIDE-SPIN ROCKET FLEXIBLE
SYSTEM WITH
CLEARANCE*
Abstract:
A hybrid approach is presented to investigate the dynamic behavior of an axially slide-spin flexible rocket with nonlinear clearance. The equations of motion of the flexible rocket are derived based upon Euler-Bernoulli beam theory and Hamilton principle and the finite element method. The characteristics of clearance between the spinning rocket and launcher are considered to be piecewise linear. Numerical solution is developed by direct integration method and demonstrates the validity of the method. The coupled dynamic behavior of axial motion and transverse vibrations of rocket are analyzed, and the influences of axially moving acceleration, spin speed, linking stiffness of elastic “shoes”, and the nonlinearity of clearance on the motion attitude of rocket are studied.
Key words:
Dynamics Spinning rocket Launch behavior |