NEHRP Clearinghouse
- Title
- Seismic Analysis of Rotating Mechanical Systems.
- File
- PB85149599.pdf
- Author(s)
- Soni, A. H.; inivasan, V.
- Source
- National Science Foundation, Washington, DC., June 1984, 252 p.
- Abstract
- Three mathematical models are developed to model a rotating mechanical system in the time domain; earthquake excitation is assumed to be a deterministic function of time. The rigid body model models the rotating system as a rigid body spinning in space, and includes factors such as gyroscopic effects, rotor bearing interaction effects, base rotation (including Coriolus effects), and base translation. The beam model incorporates the flexibility of the rotating system using Timoshenko beam theory, and includes factors such as rotatory inertia, shear deformation, intermediate disks and flywheels, and effects of initial stresses due to axial force and axial torque. The three-dimensional elasticity model incorporates the flexibility of the system using the three-dimensional theory of elasticity. Numerical examples are presented for each of the models, and results of the examples are presented in graphic form. User's manuals and listings of computer programs based upon the models (GYROT for the rigid body model; ROBET for the beam model; and AXIST for the three-dimensional model) are included.
- Keywords
- Rotation; Seismic waves; Machinery; Mathematical models; Earthquake engineering; Rotors; Programming manuals; Computer programs; Dynamic characteristics; Performance; Earthquakes