Mistuned laminate airfoil
First Claim
Patent Images
1. A fan for a gas turbine engine comprising:
- the fan mounting a first group of blades and a second group of blades;
said first group of blades and said second group of blades sharing a profile shape;
wherein said first group of blades have a first laminate composition;
wherein said second group of blades have a second laminate composition, distinct from the first laminate composition, and said first group of blades and said second group of blades each include a corresponding root shape distinct from the corresponding root shape of the other of said first group of blades and said second group of blades, wherein each of the corresponding root shapes has a same layup structure as each other of the corresponding root shapes; and
wherein a frequency of a vibratory mode of the first group of blades is offset from a frequency of a vibratory mode of the second group of blades.
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Abstract
A gas turbine engine includes a fan mounting a first group of blades and a second group of blades. The first group of blades and the second group of blades share a profile shape. The first group of blades have a first laminate composition, and the second group of blades have a second laminate composition, distinct from the first laminate composition. A frequency of a vibratory mode of the first group of blades is offset from a frequency of a vibratory mode of the second group of blades.
20 Citations
20 Claims
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1. A fan for a gas turbine engine comprising:
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the fan mounting a first group of blades and a second group of blades; said first group of blades and said second group of blades sharing a profile shape; wherein said first group of blades have a first laminate composition; wherein said second group of blades have a second laminate composition, distinct from the first laminate composition, and said first group of blades and said second group of blades each include a corresponding root shape distinct from the corresponding root shape of the other of said first group of blades and said second group of blades, wherein each of the corresponding root shapes has a same layup structure as each other of the corresponding root shapes; and wherein a frequency of a vibratory mode of the first group of blades is offset from a frequency of a vibratory mode of the second group of blades. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A gas turbine engine comprising:
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a compressor section; a combustor fluidly connected to the compressor section; a turbine section fluidly connected to the combustor; a fan drivably connected to said turbine section, the fan including a first set of blades and a second set of blades, wherein each of said first set of blades and said second set of blades share a profile; the first set of blades having a first vibratory mode; and the second set of blades having a second vibratory mode distinct from the first vibratory mode; and wherein said first set of blades and said second set of blades each include a corresponding root shape distinct from the corresponding root shape of the other of said first set of blades and said second set of blades, and each of the corresponding root shapes has a same layup structure as each other of the corresponding root shapes. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification