US 11,885,264 B2
Acoustic cores with sound-attenuating protuberances
Wendy Wenling Lin, Montgomery, OH (US); Shanmugam Murugappan, Mason, OH (US); Robert William Davidoff, Pittsburgh, PA (US); Graham Frank Howarth, Middletown, DE (US); and Andrew Michael Roach, Aberdeen, MD (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on May 28, 2021, as Appl. No. 17/333,085.
Application 17/333,085 is a continuation of application No. 16/058,171, filed on Aug. 8, 2018, granted, now 11,047,304.
Prior Publication US 2021/0324794 A1, Oct. 21, 2021
Int. Cl. F02C 7/045 (2006.01); F02K 1/82 (2006.01); B64D 33/02 (2006.01); G10K 11/172 (2006.01); B33Y 80/00 (2015.01); B33Y 10/00 (2015.01); B29C 64/10 (2017.01); B28B 1/00 (2006.01); B23P 15/00 (2006.01); B22F 10/14 (2021.01); B22F 10/18 (2021.01); B22F 10/25 (2021.01); B22F 10/28 (2021.01); B29L 31/00 (2006.01); B22F 10/12 (2021.01)
CPC F02C 7/045 (2013.01) [B22F 10/14 (2021.01); B22F 10/18 (2021.01); B22F 10/25 (2021.01); B22F 10/28 (2021.01); B23P 15/008 (2013.01); B28B 1/001 (2013.01); B29C 64/10 (2017.08); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); B22F 10/12 (2021.01); B29K 2995/0002 (2013.01); B29L 2031/7504 (2013.01); F05D 2220/323 (2013.01); F05D 2230/31 (2013.01); F05D 2230/50 (2013.01); F05D 2240/14 (2013.01); F05D 2260/96 (2013.01); Y10T 29/49323 (2015.01)] 20 Claims
OG exemplary drawing
 
1. An acoustic core, comprising:
an array of resonant cells, wherein respective ones of the resonant cells comprise a plurality of cell walls formed of an additive-manufacturing material and a resonant space defined by the plurality of cell walls, and wherein at least some of the resonant cells comprise sound-attenuating protuberances, the sound-attenuating protuberances comprising an excess amount of the additive-manufacturing material having been intentionally introduced to the cell walls and protruding into the resonant space with a semi-random orientation and/or size.