대칭면을 갖는 단일 강체의 순수 병진 및 순 짝힘 모우드 해석

Analysis for Pure Translation and Couple Modes of an Elastically Suspended Rigid Body with Planes of Symmetry

For an elastically suspended rigid body with the planes of symmetry in a three dimensional space, a novel analysis fur the vibration modes is presented. From the decompositions of the stiffness and inertia matrices, the conditions for the existence of pure translation and pure couple modes are analyzed for an elastically suspended rigid body with the planes of symmetry. From this analysis, it can be showed that how the structure of stiffness and inertia must be related in order to produce the pure translation and pure couple modes when an elastically suspended rigid body has one, two, or three planes of symmetry.