한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제19권3호
  • /
  • Pages.36-41
  • /
  • 2020
  • /
  • 1598-6721(pISSN)
  • /
  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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상대 가속도를 이용한 기초 가진을 받는 다자유도 기계 시스템의 동적 해석

Dynamic Analysis for Mechanical Systems with Multi-Degree of Freedom under Base Excitation Using Relative Acceleration

  • 이태원 (금오공과대학교 기계설계공학과)
  • Lee, Tae Won (Dept. of Mechanical Design Engineering, Kumoh National Institute of Technology)
  • 투고 : 2019.12.11
  • 심사 : 2020.02.18
  • 발행 : 2020.03.31
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초록

Mechanical systems installed in transport devices, such as vehicles, airplanes, and ships, are mostly subject to translational accelerations at the joints during operations. This base acceleration excitation has a large influence on the performance of the system, therefore, its response must be well analyzed. However, the existing methods for dynamic analysis of structures have some limitations in use. This study presents a new numerical method using relative acceleration to solve these limitations. If the governing equation of motion is linear and the mass matrix, the damping matrix, and the stiffness matrix are constant over time in the finite element analysis, the proposed method can be applied to the transient behavior analysis and the harmonic response analysis of the structure. Because it is not necessary to introduce a virtual mass and the rigid body motions are removed from the analysis, it is possible to use not only the direct integration method in the time domain but also the mode superposition method to obtain the dynamic responses. This paper demonstrates with three examples how the present method is suitable for the dynamic analysis of a structure with multi-degree of freedom.

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참고문헌

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