The experimental identification of the noise-emitting parts of a rotating tyre by means of ASQ-techniques

摘要

One of the objectives of the completed European Research project TINO is to identify, in detail, the surfaces of a rotating tire which actually generate the radiated noise. The approach is completely experimental and is based upon the ASQ (Airborne Sound Quantification) technique. The quantification of the contribution of the different tire surfaces to the sound pressure measured under defined conditions is carried out through a process of near-field measurements during rotation of the tire and static acoustic transfer function measurements. The ASQ method is further developed and tested when focusing on the applications. In first instance, the procedure has been validated and fine-tuned under well-controlled boundary conditions on a tire chassis dynamometer. The results of this investigation served also as a "reference" set of data which has been used for verification and validation of numerical tire models. In a second step, an ASQ technique has been applied under more realistic conditions when driving on a test track. For this application a newly developed acoustic tire trailer has been used.