Dispersion sensitivity analysis & consistency improvement of APFSDS
| Autor: | K. M. Rajan, Sangeeta Sharma Panda, A. Anandaraj, L. K. Gite, D.K. Joshi, R.S. Deodhar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Engineering Monte Carlo method Computational Mechanics External ballistics 02 engineering and technology Residual 01 natural sciences 010305 fluids & plasmas 020901 industrial engineering & automation Spin 0103 physical sciences Dispersion (water waves) Simulation APFSDS Accuracy Monte Carlo simulation business.industry Mechanical Engineering Yaw rate Muzzle jump factor Yaw Metals and Alloys Mechanics Dispersion In-bore dynamics Military Science Ceramics and Composites Free flight Consistency business Spin (aerodynamics) Crosswind |
| Zdroj: | Defence Technology, Vol 13, Iss 4, Pp 316-322 (2017) |
| ISSN: | 2214-9147 |
| Popis: | The purpose of this study is to investigate and quantify some possible sources of dispersion of 120 mm APFSDS tank ammunition both experimentally and numerically. This paper aims to point out the most influential source during In-Bore Balloting Motion phase as well as in External Ballistics phase of the ammunition and quantifies its effect on dispersion. Data obtained from flight trials is critically analysed and parameters affecting dispersion such as initial yaw/pitch rates, yaw/pitch dampening, plane start angle, launch spin, clearance, centre of gravity shift, dynamic imbalance angle, cross wind, etc. are observed and, later on, studied in detail by extensive External Ballistics Monte Carlo (EBMC) simulation and Six Degree of Freedom (6-DOF) trajectory analysis. In Bore Balloting Motion simulation shows that reduction in residual spin by about 5% results in drastic 56% reduction in first maximum yaw. A correlation between first maximum yaw and residual spin is observed. Results of data analysis are used in design modification for existing ammunition. Number of designs are evaluated numerically before freezing five designs for further soundings. These designs are critically assessed in terms of their comparative performance during In-bore travel & external ballistics phase. Results are validated by free flight trials for the finalised design. |
| Databáze: | OpenAIRE |
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