[ 대대대대대대 ] OOFELIE VIBROACOUSTIC [2013.11.11]
[ 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
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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