Article | REF: BM5121 V1

Torsional rotor dynamics - Types of permanent excitation

Author: Henri BLANC

Publication date: January 10, 2000

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1. Mechanical sources of permanent excitation

1.1 Connecting rod-crank system

The connecting rod exerts a cyclic force on the crankshaft crankpin, the tangential component of which gives a torque C that can be broken down into a C p component due to the action of the pressure on the piston and a C i component due to the quantities of acceleration of the connecting rod and piston. We have : C = C p + C i

with :

C p
 : 
gas torque
C ...
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Mechanical sources of permanent excitation