Modeling an axisymmetric section
Torsional rotor dynamics - Distribution of inertia and stiffness
Article REF: BM5122 V1
Modeling an axisymmetric section
Torsional rotor dynamics - Distribution of inertia and stiffness

Author : Henri BLANC

Publication date: April 10, 2000 | Lire en français

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2. Modeling an axisymmetric section

2.1 Solid cylindrical section with constant diameter

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2.1.1 Representation of distributed stiffness

It is taken into account by a massless torsion spring whose stiffness is calculated from the results of strength of materials, which assume that any straight section remains flat after deformation. As no external torque is applied during the section, the torsional moment M t in the section is constant, as is the unitary torsion angle θ. We have:

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