Analysis of Component Mode Contribution for a Full Vehicle Noise and Vibration Simulation

In this paper, the Component Mode Contribution Analysis is proposed, by which one can evaluate the mode contributions of the body and the suspension for a full vehicle interior noise. The basic idea of this technique is calculating the contribution of each component by using individual modal model of the body and the suspension based on the technique of Modal Differential Substructure (MDS). It is shown that this is an effective technique for the Eigenvalue Optimization and the Cascade Analysis, which are well used in automotive noise, vibration and harshness (NVH) problems. 車両状態における車室内騒音の寄与を車体とサスペンションのモードに分離する手法を提案する。個別にモーダル縮約した車体とサスペンションをモーダル差分構造法(MDS)でフルビークル化し、各コンポーネントのモード寄与を算出する。大規模車両モデルに適用し、固有値配列や目標性能割付等の検討に有効であることを示す。