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Stochastic sensitivity measure for mistuned high-performance turbines
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Murthy, Durbha V. Pierre, Christophe |
| Copyright Year | 1992 |
| Description | A stochastic measure of sensitivity is developed in order to predict the effects of small random blade mistuning on the dynamic aeroelastic response of turbomachinery blade assemblies. This sensitivity measure is based solely on the nominal system design (i.e., on tuned system information), which makes it extremely easy and inexpensive to calculate. The measure has the potential to become a valuable design tool that will enable designers to evaluate mistuning effects at a preliminary design stage and thus assess the need for a full mistuned rotor analysis. The predictive capability of the sensitivity measure is illustrated by examining the effects of mistuning on the aeroelastic modes of the first stage of the oxidizer turbopump in the Space Shuttle Main Engine. Results from a full analysis mistuned systems confirm that the simple stochastic sensitivity measure predicts consistently the drastic changes due to misturning and the localization of aeroelastic vibration to a few blades. |
| File Size | 9333901 |
| Page Count | 21 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930003089 |
| Archival Resource Key | ark:/13960/t2k69d40v |
| Language | English |
| Publisher Date | 1992-08-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Dynamic Response Turbine Pumps Turbine Blades Stochastic Processes Rotors Space Shuttle Main Engine Turbomachinery Flutter Aeroelasticity Prediction Analysis Techniques Oxidizers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
