Abstract
This paper discusses the vibration transmission of the violin structure for deriving the knowledge to reduce the machinery vibration and sound. We focus on the violin-bridge and the sound-post structure. The violin-bridge structure introduce the transmission to the infinite structure and has the power input proportional to the root of frequency. In this paper, the simple plate-bridge structures are used to identify the vibration to the infinite system. As a result, it is shown that the separation of the bridge and the panel is important. The sound-post structure brings to transfer the vibration to the particular part of object machinery effectively. In order to design the position of the sound-post to be set, we discuss the relation between the vibration energy model (SEA model) and the natural modes by using the test structure with two beams connected by just one bar is used to discuss. It is concluded that the relation is very simple in case that the SEA equation is satisfied and it is difficult to discuss the relation in another case.
