나선 이론을 이용한 엔진 마운트의 설계 및 분석

The vibrational phenomena of an automotive engine mainly depend on its mass distribution, and the position and stiffness of each of engine mounts. The objective of this paper is to decouple the physical modes such as three translation modes and three rotation modes and to eliminate undesired modes when an engine idles. In order to achieve this goal, the external forces are viewed from the standpoint of the screw theory. Utilizing the concept of the plane of symmetry, the physical modes are partially decoupled and the vibration responses of the engine at lower frequencies are attenuated by making the undesired vibration axes and wrenches be reciprocal in the plane of symmetry. The proposed design method is compared with existing methods, which is verified by a numerical simulation.