A metal band attached to the outer edge of turbine moving blading to dampen blade vibration is called what?

A metal band attached to the outer edge of turbine moving blading to dampen blade vibration is called what?

• A. Shroud
• B. Casing
• C. Dovetail
• D. Shrouding

Answer: (D)

Damping blade vibration in a turbine rotor is achieved with a tip shroud assembly—essentially a metal band that rings the tips of the moving blades. This shrouding ties the blade tips together and adds stiffness to the tip region. As the blades vibrate, the tips rub slightly against adjacent tips, dissipating vibrational energy as heat and reducing the amplitude of the vibration. This helps prevent fatigue and flutter that could damage the blades. The term shrouding specifically refers to that ring-like band around the blade tips, distinguishing it from the stationary casing (the outer housing) and from dovetails (the mounting interface between blade and disk).

Damping blade vibration in a turbine rotor is achieved with a tip shroud assembly—essentially a metal band that rings the tips of the moving blades. This shrouding ties the blade tips together and adds stiffness to the tip region. As the blades vibrate, the tips rub slightly against adjacent tips, dissipating vibrational energy as heat and reducing the amplitude of the vibration. This helps prevent fatigue and flutter that could damage the blades. The term shrouding specifically refers to that ring-like band around the blade tips, distinguishing it from the stationary casing (the outer housing) and from dovetails (the mounting interface between blade and disk).