Publication detail
Optimisation of Crankshaft Webs
VOPAŘIL, J. DRÁPAL, L.
Czech title
Optimalizace tvaru ramen klikového hřídele
English title
Optimisation of Crankshaft Webs
Type
conference paper
Language
en
Original abstract
Crankwebs significantly affect crankshaft's torsional and bending stiffness, and eigenfrequencies, and thus they are to a certain extent decisive for the resulting values of fatigue safety factor. However, shape optimization of crankwebs does not adversely affect the design of the main mounting dimensions of cranktrain, i.e. the position of crankpins or conrod pins. Optimizing of the crankwebs is determined by a number of conflicting requirements: high stiffness, low weight, low production cost. This article presents different shapes resulting in the dominance of individual requirements and also describes specific proposal of crankwebs for a two-stroke compression-ignition engine with contra-running pistons. Each proposal is evaluated by using a fatigue safety factor, which is calculated in two different ways.
Czech abstract
Ramena klikového hřídele významně ovlivňují jeho torsní a ohybovou tuhost, vlastní frekvence, a tudíž ovlivňují výslednou hodnotu součinitele bezpečnosti vůči mezi trvalé pevnosti. Popisovaná optimalizace se zaměřuje na tvar ramen, nikoli tvar a rozměry hlavních a ojničních čepů, jež jsou v tomto případě pevně dané. Optimalizace tvaru ramen klikového hřídele zahrnuje různé protichůdné požadavky: vysoká pevnost, nízká hmotnost, nízké náklady na výrobu. Tento článek popisuje rozdílné tvary ramen vycházející právě z různých požadavků a též presentuje návrh tvaru těchto ramen u klikového hřídele dvoudobého vznětového motoru s protiběžnými písty. Každý návrh je zhodnocen z hlediska únavové životnosti, stanovené dvěma různými způsoby.
English abstract
Crankwebs significantly affect crankshaft's torsional and bending stiffness, and eigenfrequencies, and thus they are to a certain extent decisive for the resulting values of fatigue safety factor. However, shape optimization of crankwebs does not adversely affect the design of the main mounting dimensions of cranktrain, i.e. the position of crankpins or conrod pins. Optimizing of the crankwebs is determined by a number of conflicting requirements: high stiffness, low weight, low production cost. This article presents different shapes resulting in the dominance of individual requirements and also describes specific proposal of crankwebs for a two-stroke compression-ignition engine with contra-running pistons. Each proposal is evaluated by using a fatigue safety factor, which is calculated in two different ways.
Keywords in Czech
tvarová optimalizace; klikový hřídel; součinitel bezpečnosti; únava
Keywords in English
shape optimisation; crankshaft; safety factor; fatigue
RIV year
2015
Released
22.10.2015
Publisher
Kaunas University of Technology
Location
Kaunas, Lithuania
ISBN
9955-09-935-6
ISSN
1822-296X
Book
Transport Means 2015: Proceeding of the 19th International Scientific Conference
Volume
2015
Number
1
Pages from–to
448–452
Pages count
5
BIBTEX
@inproceedings{BUT119410,
author="Jan {Vopařil} and Lubomír {Drápal},
title="Optimisation of Crankshaft Webs",
booktitle="Transport Means 2015: Proceeding of the 19th International Scientific Conference ",
year="2015",
volume="2015",
number="1",
month="October",
pages="448--452",
publisher="Kaunas University of Technology",
address="Kaunas, Lithuania",
isbn="9955-09-935-6",
issn="1822-296X"
}