TY - GEN
T1 - Free Vibration Analysis of Torsional Line Shafts of Four-Stroke Engine
AU - Rezaiguia, Abdelouahab
AU - Guenfoud, Salah
AU - Laefer, Debra F.
N1 - Publisher Copyright:
© 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Critical speed
KW - Rutishauser method
KW - Torsional free vibrations
KW - Vehicle engine
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U2 - 10.1007/978-3-030-52071-7_29
DO - 10.1007/978-3-030-52071-7_29
M3 - Conference contribution
AN - SCOPUS:85090533317
SN - 9783030520700
T3 - Lecture Notes in Mechanical Engineering
SP - 211
EP - 217
BT - Advances in Mechanical Engineering, Materials and Mechanics - Selected contributions from the 7th International Conference on Advances in Mechanical Engineering and Mechanics, ICAMEM 2019
A2 - Kharrat, Mohamed
A2 - Dammak, Fakhreddine
A2 - Baccar, Mounir
PB - Springer
T2 - 7th International Conference on Advances in Mechanical Engineering and Mechanics, ICAMEM 2019
Y2 - 16 December 2019 through 18 December 2019
ER -