Computational Ballistics III by C. A. Brebbia, A. A. Motta

By C. A. Brebbia, A. A. Motta

Masking a extensive scope of themes relating to ballistics, this ebook comprises papers awarded on the 3rd overseas convention on Computational Ballistics, held June 6-8, 2007, within the New woodland, united kingdom. Ballistics, as a technological know-how, has a large that means and is found in many elements of our daily lives. Terminal ballistics, might be its most vital department, makes a speciality of the learn of the interplay among the munition and objective and has many civilian functions, akin to in motor vehicle crashes and poultry moves on airplane, and the resultant results. This comprises the research of effect, total and microscopic structural resistance and behaviour, and integrity.The papers disguise Fluid circulate aerodynamics; inside ballistics; Terminal ballistics; Experimental mechanics/ballistics and box trying out; New advancements in computational thoughts; and structures and expertise.

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For the coupled solution, the mesh is translated back to the desired initial position ( x0 , y0 , z0 ) and the remaining angular velocity initial conditions ( q0 , r0 ) are then added. In the coupled mode, the aerodynamic forces and moments are passed to the RBD simulation which propagates the rigid state of the projectile forward in time. com, ISSN 1743-355X (on-line) Computational Ballistics III Figure 2: 3 37 Projectile orientation definitions. Flight dynamics projectile aerodynamic model The applied loads in Equations 3 and 4 are expressed in the body reference frame and split into contributions due to weight and body aerodynamic force as shown below.

U , v, w : Components of velocity vector of mass center in body reference frame. p, q, r : Components of angular velocity vector in body reference frame. Fx , Fy , Fz : Total applied force components in body reference frame. M x , M y , M z : Total applied moment components about mass center in body reference frame. V : Magnitude of relative aerodynamic velocity vector of mass center. ρ : Air density. D : Projectile diameter. α : Aerodynamic angle of attack. Cx0: Zero yaw drag aerodynamic coefficient.

Dmag: Distance from the mass center to the center of Magnus. CFD: Computational Fluid Dynamics. References [1] [2] [3] [4] [5] J. Sun, R. Cummings, “Evaluation of Missile Aerodynamic Characteristics Using Rapid Prediction Techniques,” Journal of Spacecraft and Rockets, Vol 21, No 6, pp 513-520, 1984. F. Moore, “The 2005 Version of the Aeroprediction Code (AP05),” AIAA 2004-4715, AIAA Atmospheric Flight Mechanics Conference, Providence, Rhode Island, 2004. T. Sooy, R. Schmidt, “Aerodynamic Predictions, Comparisons, and Validations Using Missile DATCOM and Aeroprediction 98,” AIAA2004-1246, AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 2004.

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