タイヤ接地・転動時における上下車軸振動予測

概要

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It is important to predict the interior noise of a passenger car for evaluation of performance of NVH. There are many sound sources including engine, power train, and tire in the passenger car. In particular, the dynamic force transmission of rolling tires from the road surface to the spindle is a critical factor in interior noise of the passenger car. We focus on structure-borne noise transferred through the spindle. It is necessary for effort of the effective tire/road noise reduction to predict spindle force excited by tire/road contact. The important issues for predicting spindle forces are tire model and how to input on the model because tire vibration characteristic change generated by rolling and contact. In this paper, we suggest the simple prediction of vertical spindle force that affect the interior noise clearly. First, we measures the spindle force generated by a projection and multiple projections. And we check the linearity of spindle force. It is found that we can predict the spindle force generated by optional projections based on the spindle force excited by a basic projection. Second, based that first mode of tire don't change generated by rolling, one degree model of a rolling tire is built up. Road force is identified from spindle force using this tire model. Finally, an estimation method of spindle force for any tire-rolling speed and height of cleat is proposed based on the identified road force.
2013-07-00