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G r o u p. Gisela Quintenz & Dr.Thomas Schneider. International CVT Conference September 2004. NOISE RADIATION. due to resonance oscillations. TABLE OF CONTENTS. SIMULATION PROCESS. DYNAMIC BEHAVIOR. OPTIMISATION. TEAM PLAY. 2. OVERVIEW. SIMULATION PROCESS. Sound pressure [dB]. - PowerPoint PPT Presentation
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NOISE RADIATIONNOISE RADIATIONdue to resonance oscillations
Gisela Quintenz &Dr.Thomas Schneider
International CVT ConferenceSeptember 2004
G r o u p
2
TABLE OF CONTENTSTABLE OF CONTENTS
OPTIMISATION
OPTIMISATIONDYNAMIC
BEHAVIORDYNAMIC
BEHAVIOR
SIMULATION
PROCESS
SIMULATION
PROCESS
TEAM
PLAY
TEAM
PLAY
3
Incitation: bearing accelerations
1
2
4
Sound pressure [dB]
FE-Model
1
2
3
4
3
OVERVIEWOVERVIEWSIMULATION
PROCESS
4
SPL-CURVESPL-CURVE
30
35
40
45
50
55
60
65
70
75
0 500 1000 1500 2000 2500 3000 3500
frequency [Hz]
pre
ssu
re [
dB
]
1300
Hz
1600
Hz
2150
Hz
600
Hz
Operational condition “3rd gear“
840
Hz
210
Hz
300
Hz
1940
Hz
2260
Hz
DYNAMIC
BEHAVIOR
5
VERTICAL BENDINGVERTICAL BENDING214 Hz
DYNAMIC
BEHAVIOR
6
600 Hz
DYNAMIC
BEHAVIOR
BEARING OSCILLATIONBEARING OSCILLATION
7
600 Hz
DYNAMIC
BEHAVIOR
BEARING OSCILLATIONBEARING OSCILLATION
8
DYNAMIC
BEHAVIOR
BEARING OSCILLATION WITH
ASSEMBLY INTERACTION
BEARING OSCILLATION WITH
ASSEMBLY INTERACTION
9
BEARING BRACKETBEARING BRACKET1300 Hz
DYNAMIC
BEHAVIOR
10
FLANGE OSCILLATIONFLANGE OSCILLATION1600 Hz
DYNAMIC
BEHAVIOR
11
PULLEY TORSIONPULLEY TORSION1940 / 2150 Hz
DYNAMIC
BEHAVIOR
12
SHAFT BENDINGSHAFT BENDING2260 Hz
DYNAMIC
BEHAVIOR
13
MOVABLE SHEAVEMOVABLE SHEAVE3290 Hz
DYNAMIC
BEHAVIOR
14
FIXED SHEAVEFIXED SHEAVE4150 Hz
DYNAMIC
BEHAVIOR
15
40
45
50
55
60
65
70
75
1000 1500 2000 2500 3000
frequency [Hz]
pres
sure
[dB
]
____ Basis
____ Damping Layer
OPTIMISATION DAMPING LAYERDAMPING LAYER(broadband effect)
16
SPL -5 dB
OPTIMISATION FLANGE DESIGNFLANGE DESIGN1300 Hz
17
OPTIMISATION FLANGE DESIGNFLANGE DESIGN
SPL -6 dB
1600 Hz
18
OPTIMISATION MOVABLE SHEAVEMOVABLE SHEAVE3290 Hz
19
OPTIMISATION FIXED SHEAVEFIXED SHEAVE4150 Hz
20
CAE & TEST:VALIDATION RESULTS
CAE & TEST:VALIDATION RESULTS
average all Micros
Frequency [Hz]
Pre
ssu
re [
dB
]
____ calculation results
____ test rig measurements
5 dB
TEAM
PLAY
TEAM
PLAY
TESTCAE
DESIGN
MEMBERS OF THE OPTIMISATION TEAM
MEMBERS OF THE OPTIMISATION TEAM
21
Thank you for your attention!Thank you for your attention!
G r o u p
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