Compliance verification method for pressurized engine static parts of aircraft engine airworthiness

The newly added airworthiness terms of CCAR33.64 (pressurized engine static parts) in “aircraft engine airworthiness regulations”(CCAR33-R2) was studied and analyzed. Experiment design method and numerical simulation method were utilized in the process to do research on pressurized engine static parts with compliance verification method and verification flow. Compliance verification process for CCAR33.64 was founded and the example of a certain type of low pressure turbine back rear casing for aircraft engine was performed. The maximum working pressure and 1.1 times maximum working pressure were taken in numerical simulation to analysis. Maximum equivalent stress were 453 MPa and 534 MPa. Maximum deformation were 0.366 mm and 0.432 mm. No permanent deformation or rupture of casing proves its compliance which provides reference for establishing airworthiness guide for pressurized engine static parts of aircraft engines.