Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
In this paper, in order to assist in quantitative evaluation when constructing an experimental SEA model, we first conduct the FEM calculations in numerical experiments to determine the large and small damping characteristics of a single flat steel plate structure. Then, using FEM and real experiments, we show the degree of variation in the FRF results and the SEA parameter results at five levels of input force from 1 N to 5 N. As a result, in the case of structure with large damping, it cannot be seen the influence of amplitude dependence of the FRF results. However, the results of the subsystem vibration energy normalized by the input power, which is a SEA parameter, showed the influence of amplitude dependence at relatively small input force. In the case of structures with small damping, the influence of amplitude dependence can be seen in the FRF results. The results of the subsystem vibration energy normalized by the input power showed that the results were more likely to vary due to the spatial averaging process of the number of input and response.
