Vibrational dampening elements

A rotor blade, comprising:

• a platform;
• a shank extending radially inward from the platform;
• an airfoil extending radially outward from a root coupled to the platform to a tip, wherein a vibrational dampening element is attached to the rotor blade and configured to adjust an amplitude of oscillations of the rotor blade, the vibrational dampening element comprising:
• a mass having a main body and a member extending from the main body, wherein the member is an annular member that surrounds the main body of the mass such that the mass defines a circular cross section;
• a casing encapsulating the mass;
• a fluidic chamber defined between the mass and the casing and filled with a fluid;
• a first fluidic portion of the fluidic chamber disposed between a first side of the mass and the casing, wherein the first fluidic portion includes a first accumulator portion that extends along the member;
• a second fluidic portion disposed between a second side of the mass and the casing, wherein the second fluidic portion includes a second accumulator portion that extends along the member, and wherein the first accumulator portion is in fluid communication with the second accumulator portion;
• and
• a primary passage that extends between the first fluidic portion and the second fluidic portion.

A vibrational dampening element attached to a turbine component and configured to adjust an amplitude of oscillations of the turbine component, the vibrational dampening element comprising:

• a mass having a main body and a member extending from the main body, wherein the member is an annular member that surrounds the main body of the mass such that the mass defines a circular cross section, and wherein the annular member is corrugated;
• a casing encapsulating the mass;
• a fluidic chamber defined between the mass and the casing and filled with a fluid;
• a first fluidic portion of the fluidic chamber disposed between a first side of the mass and the casing, wherein the first fluidic portion includes a first accumulator portion that extends along the member;
• a second fluidic portion disposed between a second side of the mass and the casing, wherein the second fluidic portion includes a second accumulator portion that extends along the member, and wherein the first accumulator portion is in fluid communication with the second accumulator portion;
• and
• a primary passage that extends between the first fluidic portion and the second fluidic portion.