Coupled-interaction launch behavior of a flexible rocket and flexible launcher

Weeks, G. E.; Cost, Thomas L.

doi:10.2514/3.28037

Cited by 11 publications

(5 citation statements)

References 4 publications

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“…(2) (5) where U all is the overall transfer matrix of the MLRS; z all is a column matrix consisting of the state vectors of all system boundary points; U j ð j ¼ 2; 5; 8; 11; 14; 17; 21; 23Þ is the transfer matrix of the rigid body with single input end and single output; and U k (k = 1, 3,4,6,7,9,10,12,13,15,16,18,20,22) is the transfer matrix of the acceleration hinge. Their detailed expressions and the corresponding parameters can be found in Rui et al 27 Substituting the boundary conditions of the MLRS…”

Section: Overall Transfer Equation Of Mlrsmentioning

confidence: 99%

“…They first simulated the full ballistic flight process of the rocket from ignition to landing; however, the rocket launcher system was still simplified to two rigid bodies, a launch tube and a rocket. Weeks and Cost 22 analyzed the coupled dynamic interaction behavior of a thrust-loaded flexible spinning rocket propelled along a flexible launcher by using a finite element method in 1980s, and then, the solution was checked by comparing with a rigid-body dynamics solution for the special case of extreme condition of large rigidity. The MLRS was simplified into two-degree-of-freedom (DOF) model to facilitate the control of the MLRS, and the simplified dynamics equation was derived by the Lagrange method.…”

Section: Introductionmentioning

confidence: 99%

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On modeling and dynamics of a multiple launch rocket system

Rui

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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Dynamics analysis is currently a key technique to fully understand the dynamic characteristics of sophisticated mechanical systems because it is a prerequisite for dynamic design and control studies. In this study, a dynamics analysis problem for a multiple launch rocket system (MLRS) is developed. We particularly focus on the deductions of equations governing the motion of the MLRS without rockets by using a transfer matrix method for multibody systems and the motion of rockets via the Newton–Euler method. By combining the two equations, the differential equations of the MLRS are obtained. The complete process of the rockets’ ignition, movement in the barrels, airborne flight, and landing is numerically simulated via the Monte Carlo stochastic method. An experiment is implemented to validate the proposed model and the corresponding numerical results.

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Section: Overall Transfer Equation Of Mlrsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On modeling and dynamics of a multiple launch rocket system

Rui

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Beal studied the dynamic stability of flexible missile under pulsating thrust, in case that the magnitude of pulsating thrust was assumed changing in the simple harmonic way [2] . Weeks, et al have studied the coupling vibration between the flexible rocket and launcher [3] . Mingori, et al have shown the stability of spin rocket under the internal mass motion and axial thrust [4] .…”

Section: Introductionmentioning

confidence: 99%

Dynamic simulation of a flexible spinning vehicle with the periodic varying thrust

Zhu

Liang

et al. 2008

J. Shanghai Univ.(Engl. Ed.)

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The dynamic response of a flexible spinning vehicle with the varying thrust was investigated. The varying thrust was modeled as a series of simple harmonic components superimposed on a constant thrust. The analytical solutions for longitudinal motion were obtained by combining the motion equations and boundary conditions, and then, the transverse bending of rocket was examined solved by considering a coupled forcing vibration with varying parameters. Numerical solutions for a rocket with end-varying thrust were studied. It is shown that the lateral vibrations and motion attitudes of rocket depend on the frequencies of varying thrust to great extent, and an important phenomenon, beating, maybe take place. The proposed approach is more accurate and efficient in comparison to those standard numerical techniques.

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“…Reference [ 1 ] handled the problems of the flexible effect of the rocket and tube and the interface contact between the rocket and tube. Reference [ 1 ] handled the problems of the flexible effect of the rocket and tube and the interface contact between the rocket and tube.…”

Section: Introductionmentioning

confidence: 99%

“…A flaw existed in Ref. [ 1 ], which only considers the flexibility of the launch tube but neglects the effect of the large overall motions of the launch tube on its flexible deformation. In other words, the launch tube cannot undergo large overall motions in this model.…”

Section: Introductionmentioning

confidence: 99%

A dynamic model for rocket launcher with coupled rigid and flexible motion

章定国

肖建强

2005

Appl Math Mech

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The dynamics of a coupled rigid-flexible rocket launcher is reported. The coupled rigid-flexible rocket launcher is divided into two subsystems, one is a system of rigid bodies, the other a flexible launch tube which can undergo large overall motions spatially. First, the mathematical models for these two subsystems were established respectively. Then the dynamic model for the whole system was obtained by considering the coupling effect between these two subsystems. The approach, which divides a complex system into several simple subsystems first and then obtains the dynamic model for the whole system via combining the existing dynamic models for simple subsystems, can make the modeling pr~xlure efficient and convenient.

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Coupled-interaction launch behavior of a flexible rocket and flexible launcher

Cited by 11 publications

References 4 publications

On modeling and dynamics of a multiple launch rocket system

On modeling and dynamics of a multiple launch rocket system

Dynamic simulation of a flexible spinning vehicle with the periodic varying thrust

A dynamic model for rocket launcher with coupled rigid and flexible motion

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