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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].

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Noise radiation

G r o u p

Gisela Quintenz &

Dr.Thomas Schneider

International CVT Conference

September 2004

NOISE RADIATION

due to resonance oscillations


Noise radiation

TABLE OF CONTENTS

SIMULATION

PROCESS

DYNAMIC

BEHAVIOR

OPTIMISATION

TEAM

PLAY

2


Noise radiation

OVERVIEW

SIMULATION

PROCESS

Sound pressure [dB]

Incitation: bearing accelerations

1

2

3

4

FE-Model

1

2

3

4

3


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SPL-CURVE

DYNAMIC

BEHAVIOR

2260 Hz

1600 Hz

1300 Hz

2150 Hz

1940 Hz

300 Hz

600 Hz

210 Hz

840 Hz

Operational condition “3rd gear“

4


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VERTICAL BENDING

DYNAMIC

BEHAVIOR

214 Hz

5


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BEARING OSCILLATION

DYNAMIC

BEHAVIOR

600 Hz

6


Noise radiation

BEARING OSCILLATION

DYNAMIC

BEHAVIOR

600 Hz

7


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BEARING OSCILLATION WITH ASSEMBLY INTERACTION

DYNAMIC

BEHAVIOR

8


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BEARING BRACKET

DYNAMIC

BEHAVIOR

1300 Hz

9


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FLANGE OSCILLATION

DYNAMIC

BEHAVIOR

1600 Hz

10


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PULLEY TORSION

DYNAMIC

BEHAVIOR

1940 / 2150 Hz

11


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SHAFT BENDING

DYNAMIC

BEHAVIOR

2260 Hz

12


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MOVABLE SHEAVE

DYNAMIC

BEHAVIOR

3290 Hz

13


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FIXED SHEAVE

DYNAMIC

BEHAVIOR

4150 Hz

14


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DAMPING LAYER

____ Basis

____Damping Layer

OPTIMISATION

(broadband effect)

15


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FLANGE DESIGN

SPL -5 dB

OPTIMISATION

1300 Hz

16


Noise radiation

FLANGE DESIGN

SPL -6 dB

OPTIMISATION

1600 Hz

17


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MOVABLE SHEAVE

OPTIMISATION

3290 Hz

18


Noise radiation

FIXED SHEAVE

OPTIMISATION

4150 Hz

19


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CAE & TEST:

VALIDATION RESULTS

TEAM

PLAY

5 dB

____ calculation results

____ test rig measurements

20


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MEMBERS OF THE OPTIMISATION TEAM

TEAM

PLAY

DESIGN

CAE

TEST

21


Noise radiation

G r o u p

Thank you for your attention!


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