Analysis of instability of a turbine engine’s rotary dram under compressive and thermal loads

Buckling is one of the main causes of breakdown in thin wall structures, so the possibility of buckling should always be considered in design and analysis. In this research, instability of a rotating drum in a turbine engine with several rows of blades attached to its external environment is analyzed. The rotary drum structure is a thin-walled conical structure that is subjected to a variety of mechanical and thermal loads. The rotary drum is modeled as a conical structure and analyzed in the Abaqus finite element software and verified by theoretical relations. The stresses applied to the structure are determined, and the buckling coefficients, or eigenvalues, are extracted, and the stability of the drum structure and its associated factors are discussed. The results of the analysis show that the effect of thermal loading on the buckling of the drum structure is greater than external pressure loadings. In the cone drum the critical stress is 710 MPa and the maximum working stress is 660 MPa.