OPTIMIZATION OF FLAT SPRING GEOMETRY WITH CONSIDERING DESIGN FEATURES AND NATURE OF DYNAMIC LOADING
Abstract
A geometry optimization method based on use of macros for finite-element analysis program ANSYS 10 ED / LS-DYNA was developed for system of series-connected flat springs used as elastic elements of catapult for launching unmanned aerial vehicles. Optimization criterion in this case is the condition of the maximum stroke of both flat springs with the minimum deviation from the symmetrical form with respect to spring midpoints. Dynamic optimization problem of compression and relaxation of flat spring system was reduced to quasi-static problem of system pre-compression and high-velocity dynamic problem of its relaxation, and it significantly reduced solution time. Solution to the first part of the problem was carried out by means of Implicit Solver of ANSYS 10 ED / LS-DYNA. Solution to the second part of the problem was obtained by means of Explicit Solver of ANSYS 10 ED / LS-DYNA based on previous part results. It was determined that optimum system in terms of stroke and deviations of symmetry of flat springs consists of identical springs which are symmetrical relative to section middles.
About the Authors
V. A. Tomilo
Physical and Technical Institute of the National Academy of Sciences, Minsk
Belarus
D. Sc. (Engineering), Assistant Professor, Head of the Deformation and Casting Technologies Research Center
Belarus
D. Sc. (Engineering), Assistant Professor, Head of the Deformation and Casting Technologies Research Center
Y. V. Kochyk
Belarusian National Technical University, Minsk
Belarus
Lecturer of the Mechanical Engineering Profile Materials Resistance Department, Machine Engineering Faculty
Belarus
Lecturer of the Mechanical Engineering Profile Materials Resistance Department, Machine Engineering Faculty
A. S. Kravchuk
Belarusian State University, Minsk
Belarus
D. Sc. (Physics and Mathematics), Assistant Professor, Professor of the Bio- and Nanomechanics Department, Mechanical and Mathematical Faculty
Belarus
D. Sc. (Physics and Mathematics), Assistant Professor, Professor of the Bio- and Nanomechanics Department, Mechanical and Mathematical Faculty
I. A. Tarasiuk
Belarusian State University, Minsk
Belarus
postgraduate-student of the Bio- and Nanomechanics Department, Mechanical and Mathematical Faculty
Belarus
postgraduate-student of the Bio- and Nanomechanics Department, Mechanical and Mathematical Faculty
References
1. Klubovich V.V., Tomilo V.A. Technologies of manufacturing and processing of special periodic sections. Minsk, BNTU, 2007, 298 p. (In Russian).
2. Kravchuk A.S., Kravchuk A.I. Digital library of mechanics and physics. Lectures on ANSYS/LS-DYNA and LS-PREPOST basics with examples of problem-solving. In 3 part. Part 1. General characteristics of interface and tools for creation of solid model of a detail. Using materials and types of finite elements models of LS-DYNA. Minsk, Belarusian State University, 2013. Available at: http://elib.bsu.by/handle/123456789/44277 (date of access: 01 October 2015). (In Russian).
3. Kravchuk A.S., Kravchuk A.I. Digital library of mechanics and physics. Lectures on ANSYS/LS-DYNA and LS-PREPOST basics with examples of problem-solving. In 3 part. Part 2. Restrictions and loadings inANSYS/LS-DYNA. Solving assigned problems and viewing solution results in ANSYS/LS-DYNA. Minsk, Belarusian State University, 2013. Available at: http://elib.bsu.by/handle/123456789/44280 (date of access: 01 October 2015). (In Russian).
4. Kravchuk A.S., Kravchuk A.I., Chashinskiy A.S. Digital library of mechanics and physics. Lectures on ANSYS/LS-DYNA and LS-PREPOST basics with examples of problem-solving. In 3 parts. Part 3. General elements of LS-PREPOST interface. Minsk, Belarusian State University, 2013. Available at: http://elib.bsu.by/handle/123456789/44281 (date of access: 01 October 2015). (In Russian)
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