Apparatus and method for vibration mitigation with dynamic vibration absorber
AssigneeSercel
InventorsMatthew Cerniway, Michael Maples, Gaetan Mellier
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Abstract
Method and dynamic vibration absorber device for reducing a resonant frequency of a node to which the dynamic vibration absorber device is attached to. The dynamic vibration absorber device includes a housing configured to be attached to the node; an absorber mass located inside the housing; and first and second diaphragms attached to the housing and configured to suspend the absorber mass inside the housing. The dynamic vibration absorber device changes a resonant frequency of the node to two smaller vibration peaks.
Claims18
A vibration mitigation assembly comprising:
- first and second elastic sections, each having a spring rate and adapted to attenuate vibrations in a specified frequency range;
- an inter-module connector configured to connect with a first end to the first elastic section and with a second end to the second elastic section;
- a head-end coupler adapted to couple the first elastic section to a component of an electro-mechanical cable or a tow assembly;
- a tail-end coupler adapted to couple the second elastic section to another component of the electro-mechanical cable or tow assembly;
- and
- a dynamic vibration absorber device located inside the inter-module connector and configured to generate an oscillation out of phase with a vibration propagating along the vibration mitigation assembly thereby changing a peak at a resonant frequency of the vibration mitigation assembly into two smaller vibration peaks,
- wherein the dynamic absorber device comprises:
- an absorber mass, and first and second diaphragms attached to the housing and configured to suspend the absorber mass inside the housing.
A dynamic vibration absorber device for reducing a resonant frequency of a node to which the dynamic vibration absorber device is attached to, the dynamic vibration absorber device comprising:
- a housing configured to be attached to the node;
- an absorber mass located inside the housing;
- and
- first and second diaphragms attached to the housing and configured to suspend the absorber mass inside the housing,
- wherein the dynamic vibration absorber device changes a resonant frequency of the node to two smaller vibration peaks.
A streamer for conducting a seismic survey comprising:
- plural sections each comprising at least one sensor component for collecting seismic data;
- a node attached ahead, in-between or behind the plural sections;
- and
- a dynamic vibration absorber device for reducing a resonant frequency of the node to which the dynamic vibration absorber device is attached, wherein the dynamic vibration absorber device comprises:
- a housing configured to be attached to the node,
- an absorber mass located inside the housing, and
- first and second diaphragms attached to the housing and configured to suspend the absorber mass inside the housing,
- the dynamic vibration absorber device being configured to generate an oscillation out of phase with a vibration propagating along the node thereby changing a peak at a resonant frequency into two smaller vibration peaks.
Dependencies are inferred from the claim text.