publication . Doctoral thesis . 2009

On Noise Generation and Dynamic Transmission Error of Gears

Henriksson, Mats;
Open Access English
  • Published: 01 Jan 2009
  • Publisher: KTH, Farkost och flyg
  • Country: Sweden
Abstract
Noise from heavy trucks is an important environmental issue. Several sources contribute to the total noise level of a vehicle, such as the engine, gearbox, tires, etc. The tonal noise from the gearbox can be very disturbing for the driver, even if the noise level from the gearbox is lower than the total noise level. The human ear has a remarkable way of detecting pure tones of which the noise from loaded gears consists of. To be allowed to sell a heavy truck within the European Union, the so called pass-by noise test must be completed successfully. The maximum noise level permitted is 80dB(A) and undercertain conditions, the gearbox can be an important contribut...
Subjects
free text keywords: Vehicle engineering, Farkostteknik, Acoustics, Akustik
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31 references, page 1 of 3

1 Introduction 1 1.1 Background . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Gear noise 2 2.1 Transmission error . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Shuttling forces . . . . . . . . . . . . . . . . . . . . . . . . 4 5 Summary of main results 8 5.1 Paper A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 Paper B . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.3 Paper C . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.4 Paper D . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.5 Paper E . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 1 0,8 tn0,6 iice0,4 f fe0,2 o cn 0 itoa−0,2 l re−0,4 r oC−0,6 −0,8 −10 [1] Houser, D. R., 1986, “The root of gear noise-transmission error,” Power Transmission design, 86(5), pp. 27-30.

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