[ 대우조선해양 ]

OOFELIE VIBROACOUSTIC [2013.11.11]

목 차

http://www.ablemax.co.kr

▶ OOFELIE VIBROACOUSTIC

▶ 주요기능

▶ 적용범위

▶ AbleMAX ㈜

▶ 적용사례

▶ BMT for DSME

[ 대우조선해양 ]

http://www.ablemax.co.kr

AbleMAX ㈜

Total Solu-tion

AbleMAX ㈜

http://www.ablemax.co.kr

AbleMAX ㈜ – 회사 연혁

http://www.ablemax.co.kr

2002

2003

2004

2005

2006

2007

2008

2010

2011

2012

에이블맥스㈜ 창업 Sinda/Fluint 독점 계약 Samcef 독점 계약

대종빌딩 사업장 이전 에이블맥스㈜ 법인 전환

ADINA 독점 계약

한국항공우주연구원 위성 열해석 분야 Sinda/Fluint 지정 및 첫 제공

ADINA 전문가 전문 고급교육 개설

한국항공우주산업㈜ 한국형 헬리콥터 사업분야 Samcef 지정

엔지니어링 서비스 지원사업부 개시 에이블맥스 전문 교육장 개설

winLIFE 독점 계약 기업부설연구소 설립

현대기아자동차 연구소 모터 해석 Samcef 군 지정

현 사업장 이전

Open engineering 독점 계약 EADS 독점 계약

2013 시험 / 해석 / 교육 One-stop service

AbleMAX ㈜

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC

[ 대우조선해양 ]

http://www.ablemax.co.kr

OOFELIE :: OPEN ENGINEERING

http://www.ablemax.co.kr

Engineering S/W (Oofelie)

•Oofelie 는 Multiphysics 전문 해석 소프트웨어

•Open engineering 는 1991 년 multiphysics CAE 를 위한 multiphysics solver 를 기반으로 벨기에에서 설립

•  Igor Klapka, Alberto Cardona and Michel Geradin 의 리더를 통해 2001 년 Open-Engineering 설립

• VibroAcoustics, FSI, Optics, MEMS, Fluids, Electromechanical, Reduction, Piezoelectric, Piezovibroacoustics 로 구성

Electro Technics: Joule heating, EM devices, Piezo-Electric actuators mo-tors

FSI-CFD: Convection, Cooling Opto-Thermo Mechanics: Thermal, mechanical optic’s deformation MEMS Design: Accelerometer, PiezoMicrophones, Sensors, RFMems Vibro Acoustics: Loudspeaker, noise prediction, acoustic response Thermo Mechanics: Package/Board Heat Mgmnt, Deformation, Stresses

OOFELIE :: 주요기능

http://www.ablemax.co.kr

For structure-cavity systems (FEM) Strongly coupled eigen modes extraction analysis Strongly coupled harmonic analysis (frequency domain)

direct method efficient modal superposition techniques

For systems radiating in exterior domain (FEM-BEM coupling) FEM for structure-cavity system VBEM for exterior domain

Symmetry and anti-symmetry planes Point source and plane wave excitation Exterior pressure visualization

Strongly coupled harmonic analysis (frequency domain) direct method efficient modal superposition techniques

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC ::

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

저주파 소음예측

: 2000 Hz 미만 해석 정확성 확보

Structure-Cavity-BEM field Strong Cou-pling

OOFELIE VIBROACOUSTIC :: FEM/BEM Coupling

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC :: Modal analysis

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC :: Harmonic analysis

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

Vibroacoustic indicators computation Mean Quadratic Pressure Radiated Acoustic Power Mean Quadratic Velocity Radiation efficiency

Mesh Mapping Capabilities for external radiation for uncoupled external radiation prediction for modes radiation efficiency computation ... to be extended for strongly coupled analysis

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

Decrease in design times and costs of systems governed by vibroa-coustic laws

Virtual prototyping Prediction of new system behaviors due to design changes

Strongly coupled approach Right prediction of strongly coupled system behaviors Works also for weakly coupled problems

Driven by a powerful GUI for pre/post applications (SAMCEF Field) Single interface for all OOFELIE and SAMCEF products Modeler included in the environment Data (materials, B.C., ...) are applied on geometry Different meshing algorithms Post processing capabilities with high added value ...

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

qipc

p 2)(

fσu 2s

Volumic equations

Boundary conditions

0fnuRigid panel:

Absorbent panel: fnnvZp

Interaction:

snf u

np 2

Scattering condition at infinity:

0)(lim 2/)1(

ikp

rpr d

r

Fixation:

Surface forces:

0u ssfσn

Vibroacoustic equations

0np

nσn ps

nfn uu

Vfi Vs

Vfe

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

1. The fluid is considered as perfect. No shear effect.

ijij p

2. Small perturbations from a nominal state

wvv 000 aappp

3. the fluid medium is isotropic and homogenous

with 00 and aa pp

4. The fluid medium stays still 00 v

is independent from time and space0

5. No volume forces 0iF

Hypotheses of classical acoustics

OOFELIE VIBROACOUSTIC :: 주요기능

http://www.ablemax.co.kr

Reduction of noise (with passive or active components) Noise prediction in passengers enclosures

cars aircrafts helicopters ...

Acoustic radiation prediction (engines, gearboxes, ...) ...

Improvement of high fidelity devices: Loudspeakers Microphones ...

Prediction of vibroacoustic behavior of tanks (strong coupling)

Acoustic signature detection equipments

OOFELIE VIBROACOUSTIC :: 적용범위

http://www.ablemax.co.kr

The model geometry

Vibroacoustic behaviourof passengers enclosures

(Harmonic analysis)

Real part of the pressure and deformed geometry at 250 Hz

Sound pressure level at ears

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Pressure field and wall deformation at 210 Hz

Acoustic pressure field behind the wall

Acoustic source diffraction by a flexible wall

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Acoustic radiation of a loud-speaker

The model geometry

Imaginary part of the pressure at 1500 Hz

Pressure field at 2500 Hz

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Coupled mode 5 (187.5 Hz)

Coupled Uncoupled

0 Hz /

30.2 Hz 41.6 Hz

86.6 Hz 126.2 Hz

100.1 Hz 148.7 Hz

115,6 Hz 151 Hz

156.5 Hz 221.4 Hz

175.6 Hz 250 Hz

187.5 Hz 261.8 Hz

244.3 Hz 309.7 Hz

277.8 Hz 354 Hz

Coupled and in-vacuum eigen frequencies

Vibroacoustic behaviour of a water tank

Coupled mode 5(115.6 Hz)

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Vibroacoustic behaviour of a muffler

The CAD model

Pressure field and deformed geometry at 1000 Hz

Pressure field at the outlet

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

External pressure field magnitude at 120 Hz

Pressure field at 120 Hz

Internal pressure field anddeformed geometry at 120 Hz

Launcher response due to plane wave excitation

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Acoustic radiation prediction of engine (with incompatible meshes)

Structural Model

Acoustic Model

Structural Mesh

Acoustic Mesh

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Mapping of structural displacementsfrom structural model to acoustic model(Real at 1000 Hz)

External acoustic pressure field at 1000 Hz

Wave file generation

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Modes radiation efficiency computation (with incompatible meshes)

Radiation efficiency of mode 3

Radiation efficiency of modes 1 & 2

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

Fast Multipole Method for large acoustic radiation problems

Pulsating tank with high wave number (k=20), Imaginary part of the pressure on the surface

Use of mutipole expansion for fast field point evaluation

Mesh mapping algorithm for strongly coupled problems

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

OOFELIE VIBROACOUSTIC :: 적용사례

http://www.ablemax.co.kr

모터 전자기력을 고려한 구조기인 소음방사 해석

주요 소음 특성 해석 / 시험 비교

VIBROACOUSTIC for DSME :: 현장적용 범위

http://www.ablemax.co.kr

Mechanicalsystems

StructurePart

Drive-train Part

1. Design[ 성능 예측 ]

2. Fabrication[ 현장설계변경 ]

3. Performance test

[ 보완 / 적용 ]

# 가진력 변화에 따른 소음예측

# 구동부 단품 소음 예측 가능

# 구동부 구조 and 실내 연성 소음 예측

# 구조변경에 따른 소음예측

# 복합재 적용 가능

# 다양한 구조 특성 치환 적용

BMT for DSME :: 다층공간 음장해석

http://www.ablemax.co.kr

2nd floor

1st floor

선체 구조물 : Shell modeling

내부 공기 : Volume modeling

층별 모델링 후 모델 연결 : Glue

Connect the structure[1st floor to 2nd floor]

장점 - 다층 구조물에 대한 해석 시 각 독립공간을 모델링 후 [ 저장 ] 각각을 모아 연결하면 다층 구조물에 대한 해석이 가능 - 다양한 위치의 가진력에 대한 소음 해석 가능

BMT for DSME :: 다층공간 음장해석

http://www.ablemax.co.kr

선체 평균 음압 [PSD] 산출

주파수 별 음압 분포 확인 가능

다층 구조물 각각의 소음 분포 확인 가능

평균 음압 [PSD]

40 Hz 50 Hz 60 Hz 70 Hz

X, Y, Z 평면의 각 위치별 음압 산출 가능

특정 위치 [node] 의 음압 산출 가능

X axis

BMT:: 다층공간 음장해석

http://www.ablemax.co.kr

Y axis Z axis

BMT:: 복합재 적용 소음 / 진동 해석

http://www.ablemax.co.kr

• 천정 부분에 Damping 재 적용

• 벽체 구조 음향 모드 적용

Damping 재

H-Beam요소 사용

BMT:: 복합재 적용 소음 / 진동 해석

http://www.ablemax.co.kr

Force

• Load

Room

BMT:: 복합재 적용 소음 / 진동 해석

http://www.ablemax.co.kr

비교 분석을 위해 Damping 재가 없는 일반 Steel 모델과 Damping 재를 포함한 모델로 2 개의 Case 로 나눠서 해석 수행

Case 2. Steel + Damping [Damping 재 적용 ]Case 1. Steel Model [Damping 재 미 적용 ]

BMT:: 복합재 적용 소음 / 진동 해석

http://www.ablemax.co.kr

일반 Steel Model [Damping 재 미 적용 ] Steel + Damping [Damping 재 적용 ]

100 Hz

250 Hz

500 Hz

감사합니다감사합니다

http://www.ablemax.co.kr