Abstract
In a typical mechanical product, it is a general method that identify the deformation mode in which significant improvement target of contributing to the response from the experiments and analysis solution and consider the improvement structure in the way of high rigidity by using a technique such as strain energy method in the conventional design and development. However in the above-mentioned method, it is often a conflicting results with weight saving and cost reduction of development requirements. Transfer path analysis (TPA) using the Finite Element Method (FEM) is an effective method of reducing noise and vibration of the automobile with respect to these issues. TPA can reveal that the transfer path from the input to the response of the evaluation point and the contribution of the path and consider the response improvement efficiently. TPA using FEM was applied to mechanical structure with a variety of transfer paths and evaluated the contribution of the vibration transfer path for the vibration response reduction. The previous research have reported that it is effective to reduce the vibration response of the evaluation point by modifying the structure of the path in the case of a path has the dominant contribution. However, there are problems that the structural change guideline for the contribution analysis result is unclear and it is not possible to propose the modification guideline for the mechanical structure when the contributions of multiple paths are dispersed. In order to solve these problems, it is proposed to evaluate contribution in each degree of freedom by utilizing characteristics of the TPA. Then, it is verified that whether the vibration response of the evaluation point can be reduced by controlling the contribution by suppressing the transfer force with large degree of freedom of contribution. As a result, reduction of the vibration response at the evaluation point was realized by controlling the contribution to the frequency at which the contributions of multi paths were dispersed, which was the conventional problem by the proposed method.
