University of Oulu

Vuotikka, A.-J., Jokinen, M., Halla-aho, P., Aho, J., Mäntylä, A., & Frondelius, T. (2020). Finite element method modeling of crankshaft axial impact measurements. Rakenteiden Mekaniikka, 53(2), 85-99.

Finite element method modeling of crankshaft axial impact measurements

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Author: Vuotikka, Antti-Jussi1; Jokinen, Marko1; Halla-aho, Pasi2;
Organizations: 1Global Boiler Works Oy
3Oulun yliopisto
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.9 MB)
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Language: English
Published: Rakenteiden mekaniikan seura, 2020
Publish Date: 2020-12-03


It has been recently discovered that there is a periodical axial impact phenomenon in a running engine crankshaft. Bending of the shaft causes significant 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 fluctuations in a complex-shaped Wärtsilä sixteen vee 32 engine crankshaft by using an explicit finite element method (FEM) during the first 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 finding is that a substantive amount of energy is trapped in the head region and the first two crank pins of the crankshaft, which can affect crankshaft durability regarding high-cycle fatigue.

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Series: Rakenteiden mekaniikka
ISSN: 0783-6104
ISSN-E: 1797-5301
ISSN-L: 0783-6104
Volume: 53
Issue: 2
Pages: 85 - 99
DOI: 10.23998/rm.80099
Type of Publication: A1 Journal article – refereed
Field of Science: 214 Mechanical engineering
Funding: The authors would like to acknowledge the financial support of Business Finland (formerly Tekes) in the form of a research project WIMMA Dnro 1566/31/2015.
Copyright information: © 2020 The Authors. Open access under license CC BY 4.0.