Author: Valentin Slavov
Articles
- INVESTIGATIONS OF THE FORCED TORSIONAL VIBRATIONS IN THE SAW UNIT OF A KIND OF WOOD SHAPERS, USED IN THE WOOD PRODUCTION
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Summary
The proposed study presents a numerical investigation of the forced torsional vibrations in the wood shaper’s saw unit caused by the variable moments on the drive electric motor and the wood shaper’s saw. The influence on the vibrations of the blades’ number of the saw, which really work, is investigated. This research is done on the base of a concrete mechanic-mathematical model for investigation of the torsional vibrations of a wood shaper’s saw developed by the authors. The main features in the construction of this kind of wood shapers are rendered an account in this model. The investigation`s results can be used as a base for making some concrete and well-founded recommendations concerning the operation of these machines. These recommendations are important for increase of reliability of the wood shapers as well as the accuracy and quality of their production.
Keywords: wood shapers, modeling, torsional vibrations
- NUMERICAL INVESTIGATIONS OF THE NATURAL FREQUENCIES AND MODE SHAPES OF THE TORSIONAL VIBRATIONS IN THE SAW UNIT OF A KIND OF WOOD SHAPERS, USED IN THE WOOD PRODUCTION
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Summary
Some numerical investigations of the natural frequencies and mode shapes of the wood shaper’s saw unit are presented in this study. These researches are done on the base of a concrete mechanic-mathematical model for investigation of free torsional vibrations of a wood shaper’s saw developed by the authors. The main features in the construction of these kind wood shapers are rendered an account of this model. The two most commonly used driving mechanisms are modeled – with a wedge belt and with a ribbed belt. The studies allow a comparison of the vibration behavior of the mechanism for both drives. The results of this study allow the determination of the resonant work regimes. The exactly determination of these regimes is important for introduction of adequate measures which can guarantee their using. The investigation`s results can be used as a base for making some recommendations concerning the increase of reliability of the wood shapers as well as the accuracy and quality of their production.
Keywords: wood shapers, modeling, torsional vibrations
- MODELING AND ANALYSIS OF THE ELEMENTS AND STRUCTURE OF THE ARMCHAIR FOR A REST
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Summary
Upholstered furniture consists of supporting structure (skeleton) and upholstery. The proposed work presents modeling and analysis of the elements and structure of an armchair for a rest. The study is done on the base of modern software products, using traditional research of this type of sizes and load schemes According to the study, some necessary recommendations for the design optimizing concerning its practical implementation with specific parameters are given.
Keywords: Armchair for a rest, modeling, the design optimizing