유도탄 장착용 레일타입 발사대의 동적 특성에 대한 연구 (Dynamic Characteristics of Rail-type Launcher for Missile Loading)

서지정보

· 발행기관 : 한국소음진동공학회
· 수록지 정보 : 한국소음진동공학회논문집 / 33권 / 5호 / 531 ~ 538페이지
· 저자명 : 조우제, 정회인, 박진보, 최동설

초록

This paper describes dynamic characteristics of a rail launcher with a snubber to reduce the nonlinear behavior due to the gap between the missile and the rail launcher. To analyze the dynamic characteristics of the boundary conditions between the snubber of rail launcher and missile, first, the finite element method (FEM) model was verified by natural frequency and mode shape of the modal test and modal analysis of the missile and rail launcher, which are linear systems. Then, ODS utilizing white noise random vibration and modal analysis were compared to analyze the dynamic characteristics of the boundary condition to which snubber was applied employing the verified FEM model. As a result of the analysis, a natural frequency difference was more than 30% in the 1st mode, which is the rigid body motion of the missile on the Z and Y-axes. It is predicted that because the spring elastic energy stiffness of the snubber is lower than the boundary condition of the linear analysis, the frequency difference occurred owing to nonlinear behavior by gap. This study confirmed the nonlinear behavior of the rail launcher loaded missile. Additional studies on the nonlinear behavior are necessary.

영어초록

This paper describes dynamic characteristics of a rail launcher with a snubber to reduce the nonlinear behavior due to the gap between the missile and the rail launcher. To analyze the dynamic characteristics of the boundary conditions between the snubber of rail launcher and missile, first, the finite element method (FEM) model was verified by natural frequency and mode shape of the modal test and modal analysis of the missile and rail launcher, which are linear systems. Then, ODS utilizing white noise random vibration and modal analysis were compared to analyze the dynamic characteristics of the boundary condition to which snubber was applied employing the verified FEM model. As a result of the analysis, a natural frequency difference was more than 30% in the 1st mode, which is the rigid body motion of the missile on the Z and Y-axes. It is predicted that because the spring elastic energy stiffness of the snubber is lower than the boundary condition of the linear analysis, the frequency difference occurred owing to nonlinear behavior by gap. This study confirmed the nonlinear behavior of the rail launcher loaded missile. Additional studies on the nonlinear behavior are necessary.

참고자료

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