Numerical Model for Collision Damping of Blades’ Tips
In order to obtain the collision damping of blades’ tips characteristics, around a blades for a 300MW steam turbine, the COMBIN40 element of ANSYS was adopted. The collision damping among blades' tips is equivalent to a damping of spring and friction with a gap. Under the conditions of exciting force and rotating blade natural frequency ,the vibration of a harmonic response was analysed, the nonlinear impact damping of blade response characteristics and the vibration damping mechanism of collision was got.
X. Jin et al., "Numerical Model for Collision Damping of Blades’ Tips", Applied Mechanics and Materials, Vols. 130-134, pp. 2349-2353, 2012