Containment Mechanism and Structural Optimization Research for Disk Containment of High-Energy Rotor

In order to study the mechanism for disk containment of high-energy rotor, with test rotor manufactured with precast cracks, containment tests are carried out using a high-speed spin tester, and the nonlinear explicit dynamics commercial software is used to simulate the containment process of the high-energy rotor. It is found that the impacted area and the edge material in the containment case are compressed and sheared respectively after the impact of the disk fragments by test and simulation results. If the local perforation failure does not occur, the penetration of the fragment is determined by the tensile strain energy of the impacted area and the circumferential extension of the case. Then taking some turbine starter disk an example, the thickness and material analysis of the containment ring are discussed. The design method of determining the allowable thickness of the containment ring by the critical containment thickness 1.15 times of the safety factor is proved. By comparing the containment capacity of different materials, it is concluded that using higher ultimate strength and elongation material to achieve significant weight reduction. This study has some significance to the design of the containment structure of the high energy rotor.