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1. (WO2019043344) ACOUSTIC PANEL FOR AIRCRAFT PROPULSION UNIT NACELLE, AND RELATED PRODUCTION METHODS
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Pub. No.: WO/2019/043344 International Application No.: PCT/FR2018/052134
Publication Date: 07.03.2019 International Filing Date: 30.08.2018
IPC:
G10K 11/00 (2006.01) ,B32B 3/12 (2006.01) ,B64C 1/40 (2006.01) ,G10K 11/16 (2006.01) ,G10K 11/172 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
B PERFORMING OPERATIONS; TRANSPORTING
32
LAYERED PRODUCTS
B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
3
Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form
10
characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
12
characterised by a layer of regularly-arranged cells whether integral or formed individually or by conjunction of separate strips, e.g. honeycomb structure
B PERFORMING OPERATIONS; TRANSPORTING
64
AIRCRAFT; AVIATION; COSMONAUTICS
C
AEROPLANES; HELICOPTERS
1
Fuselages; Constructional features common to fuselages, wings, stabilising surfaces, or the like
40
Sound or heat insulation
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
172
using resonance effects
Applicants:
SAFRAN NACELLES [FR/FR]; Route du Pont 8 76700 GONFREVILLE L'ORCHER, FR
Inventors:
DESJOYEAUX, Bertrand; FR
VERSAEVEL, Marc; FR
Agent:
CABINET GERMAIN & MAUREAU; 31-33 rue de la Baume 75008 PARIS, FR
Priority Data:
17/5803031.08.2017FR
18/5321012.04.2018FR
Title (EN) ACOUSTIC PANEL FOR AIRCRAFT PROPULSION UNIT NACELLE, AND RELATED PRODUCTION METHODS
(FR) PANNEAU ACOUSTIQUE POUR NACELLE D'ENSEMBLE PROPULSIF D'AÉRONEF, ET PROCÉDÉS DE FABRICATION S'Y RAPPORTANT
Abstract:
(EN) The invention relates to an acoustic panel (12) with a cellular core (24) comprising cells (28) that are provided with one or more obstacles (36, 38), each of said obstacles (36, 38) extending transversely in relation to the main axis of the associated cell (28) so as to increase the length of the path (F) that sound waves travel through the cell (28). The invention also relates to methods enabling the production of such a panel (12), implementing steps of cutting, folding and bonding that are suitable for creating cells provided with such obstacles (36, 38).
(FR) L'invention se rapporte à un panneau acoustique (12) du type à âme alvéolaire (24) comprenant des cellules (28) pourvues d'un ou plusieurs obstacles (36, 38), chacun de ces obstacles (36, 38) s'étendant transversalement par rapport à l'axe principal de la cellule (28) associée de manière à augmenter la longueur du chemin (F) parcouru par les ondes sonores à travers la cellule (28). L'invention concerne aussi des procédés permettant de fabriquer un tel panneau (12), mettant en œuvre des étapes de découpage, pliage et collage aptes à constituer des cellules dotées de tels obstacles (36, 38).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)