The Aeronautical Journal: Volume 33 - Issue 227

The Effect of the Damping of the Throws on the Torsional Vibration of the Crankshaft System of an Internal Combustion Engine
J. Morris
Published online by Cambridge University Press:

28 July 2016, pp. 1086-1087
- Article
- - Get access
    
    Check if you have access via personal or institutional login
    
    Log in Register
- Export citation
In the Journal for October, 1923, I gave the following formulæ for the frequencies in torsional vibration of the crankshaft system (see Fig. 1) of a direct drive engine having equal throws and equal journals, viz.:—
1
and
2
where
3
c=torsional stiffness (the CI/L) of an “equivalent journal”;
p=polar moment of inertia of the “equivalent pulley” of a throw;
r=ratio of the torsional stiffness of the shaft between the airscrew and the first “ equivalent pulley,” to that of an “ equivalent journal “;
n=number of throws.

The Aeronautical Journal