Open AccessFinite element method modeling of crankshaft axial impact measurements
Author(s) -
Antti-Jussi Vuotikka,
Marko Jokinen,
Pasi Halla-aho,
Jukka Aho,
Antti Mäntylä,
Tero Frondelius
Publication year - 2020
Publication title -
rakenteiden mekaniikka
Language(s) - English
Resource type - Journals
eISSN - 1797-5301
pISSN - 0783-6104
DOI - 10.23998/rm.80099
Subject(s) - crankshaft , crank , finite element method , thrust , structural engineering , main bearing , work (physics) , engineering , mechanical engineering , cylinder
It has been recently discovered that there is a periodical axial impact phenomenon in a running engine crankshaft. Bending of the shaft causes signicant extension of the crankshaft and impact to the engine block through the axial thrust bearing. The aim of this work is to study impact-induced energy uctuations in a complex-shaped Wärtsilä sixteen vee 32 engine crankshaft by using an explicit nite element method (FEM) during the rst 25 ms after impact. Using the FEM allows us to study real components used in industry, and analyze their dynamics in the transient phase. In conclusion, we found interesting results that can be used as guidelines for a full-scale crankshaft measurement instrumentation plan. The full-scale measurements will be performed later in the Wärtsilä Oy facility at Vaasa, Finland. The main nding is that a substantive amount of energy is trapped in the head region and the rst two crank pins of the crankshaft, which can aect crankshaft durability regarding high-cycle fatigue.