Probabilistic Rotor Design System (PRDS) -- Gas Turbine Engine Design

摘要

The USAF Probabilistic Rotor Design System (PRDS) contract (F33615- 90-C-2070) was designed to develop, validate and demonstrate a probabilistic alternative to existing deterministic design philosophy. This report is a final summary of the work done for disk applications (a second team at GE Aircraft Engines is continuing work on a contract extension focusing on blades). Included in this report are: (1) A summary of physical mechanisms relevant to disk design. (2) A review of records on disk failures. (3) Extensive discussion of the concept of risk based design and recommendations for applications. (4) Description of a Probabilistic Design Analysis System developed by GE. (5) In depth review of validation testing of Probabilistic Fracture Mechanics base on fatigue testing of seeded push-pull and model disk specimens. (6) An introduction to risk based design optimization with an example application. (7) Specific suggestions for incorporating elements of risk based design into the Engine Structural Integrity Program (ENSIP, MIL SPEC 1783).