DYNAMICS AND STABILITY OF GUN-BARRELS WITH MOVING BULLETS | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 13, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Pages 33-46 PDF (552.08 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2008.38981 | ||
| Authors | ||
| WAGIH A.1; ALADIN M.2; TAWFIK M.3; NEGM H. M.4 | ||
| 1Egyptian Air-force, Cairo, Egypt. | ||
| 2Modeling and Simulation in Mechanics, German University in Cairo. | ||
| 3Mechanical Engineering Department, British University in Egypt, Cairo, Egypt. | ||
| 4Aerospace Engineering Department, Cairo University, Cairo, Egypt. | ||
| Abstract | ||
| ABSTRACT In this study, the stability of a Timoshenko beam under the effect of a moving projectile will be reintroduced using simple eigenvalue analysis of a finite element model. The eigenvalues of the beam change with the mass, speed, and position of the projectile, thus, the eigenvalues are evaluated for the system with different speeds and masses at different position until the lowest eigenvalue reaches zero indicating the instability occurrence. Then the dynamics of the beam will be investigated using the Newmark algorithm at different values of speed and mass ratios. It is concluded that the technique used to predict the stability boundaries is simple, accurate, and reliable. | ||
| Keywords | ||
| Timoshenko beams; beam dynamics; beam stability; time response; cantilever beam and moving bullet | ||
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