The two-span three-support rotor is a typical structure of rotating machinery such as steam turbine units, compressor units, and water pumps. When the elevation of the sliding bearing changes, the misalignment excitation of the coupling and the stiffness damping of the bearing will change accordingly, which will affect the vibration characteristics of the rotor. This paper can provide theoretical guidance and data support for the structural design and fault diagnosis of the two-span three-support rotor.

This study explores the actual demand of wide-frequency vibration isolation and low-frequency shock resistance of a vibration isolation system for complex external excitation of the aircraft turboprop engine. The performance of a type of turbo-propeller engine vibration isolation system at a 1.5–2000 Hz vibration frequency is investigated by combining simulation and experimental research.  It provides the test basis and idea for the optimization of the aero-engine vibration isolation system.

Helicopters are easy to hit by hard objects during operation, harming pilots. So, we want to provide some technical references for the safe operation of helicopters. What are the factors that affect the safety? Then we analyze how to control this factor through simulation and specific experiments and observe the vibration of the equipment. Finally, results show that the stability of the equipment can be enhanced by designing a certain device to adjust the influencing factors.