Compact low-frequency wave absorption device
AssigneeThe Hong Kong University of Science and Technology
InventorsPing SHENG, Zhen DONG
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Abstract
Rotational translation of an inertial mass rotor is used for providing damping of low frequency noise and vibration. An axial component is mounted so as to translate axial movement of an inertial linearly-displaceable member to rotational movement of an inertial mass rotor. The translation to rotational movement of the inertial mass rotor provides inertial amplification in the form of translational-rotational coupling. This enables the construction of a compact assembly, which allows light ultra-low frequency resonances to be concentrated, and which absorbs such low frequency noise energy.
Claims20
A method for providing damping of low frequency noise and vibration, the method comprising:
- providing an axial component with a linearly-displaceable member;
- linking an inertial mass rotor to the inertial linearly-displaceable member so as to cause a translation of axial movement of the inertial linearly-displaceable member to a rotational movement of the inertial mass rotor, thereby providing inertial amplification in the form of translational-rotational coupling.
A low frequency noise and vibration damping apparatus comprising:
- a support or housing;
- an inertial linearly-displaceable member supported within the support or housing
- an inertial mass rotor supported within the support or housing;
- a linkage coupling the inertial linearly-displaceable member to the inertial mass rotor, linking the inertial linearly-displaceable member to the inertial mass rotor to cause axial movement of the inertial linearly-displaceable member to translate to a rotational movement of the inertial mass rotor, thereby providing inertial amplification in the form of translational-rotational coupling.
Apparatus for providing damping of low frequency noise and vibration, comprising:
- a support or housing;
- inertial means responsive to vibration or movement by linearly moving with respect to the support or housing;
- an inertial mass rotor;
- and
- translational-rotational coupling means for translating the linear movement of the inertial means to a rotational movement of the inertial mass rotor.
Dependencies are inferred from the claim text.