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Dynamics of Track/Wheel Systems on High-Speed Vehicles
Isamu Kato,Yoshiaki Terumichi,Masahito Adachi,Kiyoshi Sogabe 대한기계학회 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.1S
For high speed railway vehicles, we consider a vibration of flexible track/wheel system It is very Important to deal With the complex phenomena of high-speed vehicles that can be occurred<br/> In the vertical vibration of the system From a viewpoint of multibody dynamics, this kind of problem needs accurate analysis because the system Includes mutual dynamic behaviors of rigid body and flexible body The simulation technique for the complex problems is also discussed We consider the high-speed translation, rail elasticity, elastic supports under the rail and contact rigidity Eigen value analysis is also completed to verify the mechanism of the coupled vertical vibration of the system<br/>
Study of rocking motion of rigid body with slide contact
Keisuke Nozaki,Yoshiaki Terumichi,Kazuhiko Nishimura,Kiyoshi Sogabe 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.4
The purpose of this study is to formulate the motion of a rigid body with unilateral contact problems by applying techniques of multibody dynamics and to analyze the issue of rocking condition of rigid bodies with slide contact. In To investigate rocking motion with slide contact, we formulate for dynamics of a simple rigid body system with a unilateral contact model. Judgment for the occurrence of contact between a rigid body and a base is applied. The planar motion of a rigid body system having a simple shape and both with and without slide cases is assumed. Using constraint conditions for the contact as algebraic equations, the rocking motion of the rigid body, including slide and frictional force, is analyzed. The differential algebraic equation is solved by the augmented method with Lagrange multipliers, using generalized coordinates and independent variables that describe the contact points. The influence of the frequency and amplitude of disturbance given to the base is discussed.