Altering vibration frequencies of workpieces, such as gas turbine engine blades
AssigneeLSP Technologies, Inc.
InventorAllan H. Clauer
Life of this patent
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Abstract
A method of modifying the vibration resonance characteristics of a workpiece includes the steps of determining a vibratory resonance condition frequency of the workpiece, determining the mode shape of said vibratory resonance condition, locating an area on the workpiece that includes a maximum curvature for the determined mode shape and vibratory resonance condition frequency; then laser shock peening the located area to create residual compressive stresses within the workpiece to shift the determined vibratory resonance condition frequency. A workpiece such as a gas turbine engine blade is also disclosed.
Claims9
A method for modifying the vibration resonance characteristics of a workpiece, the method comprising:
- determining a vibratory resonance condition frequency of the workpiece;
- determining the mode shape of said vibratory resonance condition;
- determining the maximum curvature for the determined mode shape and vibratory resonance condition frequency;
- locating an area on the workpiece that includes the maximum curvature for the determined mode shape and vibratory resonance condition;
- then
- laser shock peening the located area to create residual compressive stresses within the workpiece to shift the determined vibratory resonance condition frequency.
A method of modifying the vibration resonance characteristic of a workpiece, the method comprising:
- determining a vibratory resonance condition frequency of the workpiece;
- determining the mode shape of the vibratory resonance condition;
- determining the maximum curvature for the determined mode shape and vibratory resonance condition frequency;
- locating an area on the workpiece that includes the maximum curvature for the determined mode shape and vibratory resonance condition;
- then
- inducing residual stresses to the located area to shift the determined vibratory resonance condition frequency.
Dependencies are inferred from the claim text.