OS-E: 6015 Direct Transient Response Analysis

This examples demonstrates the Rotor Dynamics direct transient response analysis using two coaxial rotors.

Figure 1. FE Model


Model Files

Before you begin, copy the file(s) used in this example to your working directory.

Model Description

This example consists of two coaxial rotors modeled using 1D elements with mass added at the center. The rotors are attached to the stators through Spring and Damper elements at both the ends. Dynamic loading conditions are applied using unbalanced rotating load.
FE Model 1D Elements
Rotor
CBAR, CONM2
Stator
SPC, CDAMP, CELAS
Junction
RBE2 Elements
Material Material MAT1 Rotor:
Young’s modulus
2×107
Poisson ratio
0.3
Initial density
1×10-3
Reference Guide Entries Keywords RGYRO, ROTORG, RSPINT, UNBALNC

Results

Figure 2. z-displacement versus Time Plot on the Grid at the Center of the Rotor