Free Vibration Analysis of Torsional Line Shafts of Four-Stroke Engine

Abdelouahab Rezaiguia, Salah Guenfoud, Debra F. Laefer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The free vibration analysis of torsional line shafts is the preliminary step for any torsional forced vibration system and, in certain cases, can be sufficiently accurate. This work introduces a stream-lined approach for free vibration analysis of the torsional line of a four-stroke engine with four cylinders (operating range 600–5500 rpm). The equivalent torsional model, calculated by the British International Combustion Engine Research Association empirical method, has eighteen degrees of freedom. On the basis of some simplifying hypothesis, the equations of motion are obtained using Lagrange’s formalism. Then the Rutishuser method is used to calculate natural frequencies and mode shapes. The main objective is to determine particularly dangerous crankshaft rotational speeds, as well as the magnitudes of the torsional vibrations of the different disks during resonance. The adaptation example of the motor shaft line shows that for the investigated configuration a speed of 710 rpm (importance 2.36 for harmonic 2), is a particularly dangerous rotational speed for the entire operating range of the motor.

Original languageEnglish (US)
Title of host publicationAdvances in Mechanical Engineering, Materials and Mechanics - Selected contributions from the 7th International Conference on Advances in Mechanical Engineering and Mechanics, ICAMEM 2019
EditorsMohamed Kharrat, Fakhreddine Dammak, Mounir Baccar
PublisherSpringer
Pages211-217
Number of pages7
ISBN (Print)9783030520700
DOIs
StatePublished - 2021
Event7th International Conference on Advances in Mechanical Engineering and Mechanics, ICAMEM 2019 - Hammamet, Tunisia
Duration: Dec 16 2019Dec 18 2019

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

Conference7th International Conference on Advances in Mechanical Engineering and Mechanics, ICAMEM 2019
CountryTunisia
CityHammamet
Period12/16/1912/18/19

Keywords

  • Critical speed
  • Rutishauser method
  • Torsional free vibrations
  • Vehicle engine

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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