Cantilever rotor is the key component part of mechanical equipment. Based on the failure mode of dynamic response of the cantilever rotor, the ensitivity factors which affect structure reliability, such as load, size of structure, properties of materials, are analyzed. The utmost equations of the cantilever rotor in both static and dynamic states are built. Each equation is linearized at the average point by Taylor Expansion scheme. The reliability of structure is calculated by employing the theory of the primary second moment. The reliability results of considering and ignoring the inertial force respectively are compared mutually and analyzed. Then, an effective reliability analysis method for cantilever rotor is established.

Constrained damping treating is made on wheel’s surface for domestic standard wheels of passenger trains. Six types of damped wheels are designed. Standard and damped wheel models are built with ANSYS and the effects of thickness of damped layer, material and thickness of constrained layer on reducing wheel vibration are analyzed respectively. Then structural loss factors of these wheels are calculated by means of FEM method. The analysis has demonstrated that if the thicknesses of the damping layer and constraint layer are larger, the vibration reduction will be more effective. The effect of vibration reduction of such damped wheels with steel constraint ayer is obviously better than those damped wheels with aluminum constraint layer. And the structural loss factors of the damped wheels are much larger than those of the standard wheels. Most structural loss factors are above 0.003 under different working conditions within the frequency range of 1500 Hz to 5000Hz.