torsieveer

Torsieveer is a term used to describe a class of devices intended to mitigate torsional vibrations in rotating machinery by filtering torsional energy at selected frequencies. In proposed designs, a torsieveer combines a torsionally compliant shaft segment with a damping element and a frequency-selective 'sieve' that attenuates harmonic torque transmitted through the shaft.

The sieve element acts as a nonlinear filter that dissipates energy when shaft excitations match target frequencies. Designs may use tunable stiffness elements, viscous or frictional dampers, and adjustable masses or geometry to shift the filter's resonance. Some concepts employ magnetorheological or fluid-based damping to enable real-time adjustment.

Construction typically places the device between driver and load or within a gear train, with mechanisms to adjust resonance and damping. Practical implementations must manage added mass, complexity, and potential friction losses, limiting use to systems with sufficient space and load margins.

Applications include automotive drivetrains to reduce driveline shudder, wind turbine gearboxes to suppress torsional chatter, industrial gearboxes, and marine propulsion where harmonic excitation is a concern. The concept is mainly discussed in theoretical or experimental contexts rather than as a standardized commercial component.

Etymology and status: The name blends torsion and sieve, signaling selective filtering of torsional energy. The term appears in speculative engineering writing rather than coding a formal specification; no universal standard exists, and evidence of widespread adoption is limited.

See also: related concepts like torsional damper and tuned mass damper.