Development of a method guideline for the determination of bearing transfer functions

 

The scientific focus of the AiF project lies in the determination of the dynamic transmission behaviour of rolling bearings, as these machine elements, which are always in the flow of forces, are decisively involved in the transmission of vibrations to the environment of a system. The following points should be considered in the project:

Test bench investigations

For frequency response investigations at rotational speed, a particularly careful design of the test bench to be considered is necessary due to many influencing factors on the dynamic behaviour. From previous projects, the WZL already has a test bench for the dynamic measurement of rolling bearings, which must be modified for the present application. The surrounding construction of the test bench must be adapted in such a way that a variation of the bearing type, the bearing size and the bearing arrangement is possible on a modular basis and the frequency responses can be determined at standstill and under speed. The test bench is to be designed for investigations of speeds up to 10,000 rpm. As a result of the investigations, the measured transmission frequency responses shall be used to extract the dynamic properties of the rolling bearings and to further use them for a map model.

Method Guide - Modelling / Measurement

In order to make the theoretical and experimental results of the project usable for users, methods for measuring and simulating bearing transfer behaviour are to be systematically prepared and compiled for the first time. The interdependencies that occurred during the experiments are to be defined for this purpose and correlated with the various simulation approaches and measurement methods. Furthermore, the validity limits for the respective modelling approaches and the associated possible applications, which result from the theoretical investigations, must be described.