Verification of NESSUS Code on Space Propulsion Components

by K. R. Rajagopal, Rockwell Int Corp, United States,
A. DebChaudhury, Rockwell Int Corp, United States,
J. F. Newell, Rockwell Int Corp, United States,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

Application of probabilistic finite element method to the structural analysis of typical space propulsion components such as turbine blades and high pressure ducts is reported. The study uses Probabilistic Loads obtained through engine system models and uses NESSUS family of computer codes to obtain the cumulative distribution function of structural response variables. The turbine blade study considered pressure, temperature, speed, geometry, and material properties as random. The duct analysis treated damping, random dynamic and periodic dynamic loads as uncertain. The output responses obtained include stresses, stress resultants and displacements. The practical aspects of the application of probabilistic analysis methods using comparatively large finite element models are discussed.

Subject Headings: Finite element method | Stress analysis | Probability | Dynamic loads | Structural analysis | Computer models | Structural reliability

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