Auswertung des Anregungsverhaltens eines mehrstufigen Getriebes: Conference Proceedings

The noise behaviour of gearboxes is influenced substantially by gear mesh excitation. Therefore, low level of mesh excitation is one of major design goals being considered as soon as possible in the design stage. There are many approaches are available for the evaluation of gear noise behavior in the literature. These can be categorized into quasistatic and dynamic approaches. Despite comprehensive results, the dynamic simulation is quite time-consuming and needs extensive effort on modelling. Therefore, this approach is not suitable for the gear design stage. When the calculation time is critical, the quasistatic approaches are advantageous thanks to the simplification of mathematical terms in the calculation. Therefore, they are preferred in the design and optimatization stage. However, quasistatic approaches are focused mainly on evaluation of noise behaviour of single-stage gearboxes so far. In order to enable the evaluation for multistage gearboxes, the tooth excitations of each gear mesh can be extended into the bearing force. Furthermore, the bearing force level can be derived from this measurement and used as vibration indicator. In this paper, validation of the bearing force and bearing force level is investigated by means of vibration measurements on a multistage gearbox. The correlation of the numerical bearing force and measured structure borne noise is investigated. Additionally, the geometrical position of the result excitation due to engagement angles varies in time for multistage gearboxes. The spectral analysis of the total excitation is performed by means of its orthogonal components.