Dynamics of Multibody Systems With Spherical Clearance Joints

Journal of Computational and Nonlinear Dynamics - Tập 1 Số 3 - Trang 240-247 - 2006
Paulo Flores1, Jorge Ambrósio2, José Carlos Pimenta Claro1, Hamid M. Lankarani3
1Departamento de Engenharia Mecânica, Universidade do Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
2Instituto de Engenharia Mecânica (IDMEC), Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisboa Portugal
3Department of Mechanical Engineering,#N#Wichita State University,#N#Wichita, KS 67260

Tóm tắt

This work deals with a methodology to assess the influence of the spherical clearance joints in spatial multibody systems. The methodology is based on the Cartesian coordinates, with the dynamics of the joint elements modeled as impacting bodies and controlled by contact forces. The impacts and contacts are described by a continuous contact force model that accounts for geometric and mechanical characteristics of the contacting surfaces. The contact force is evaluated as function of the elastic pseudo-penetration between the impacting bodies, coupled with a nonlinear viscous-elastic factor representing the energy dissipation during the impact process. A spatial four-bar mechanism is used as an illustrative example and some numerical results are presented, with the efficiency of the developed methodology discussed in the process of their presentation. The results obtained show that the inclusion of clearance joints in the modelization of spatial multibody systems significantly influences the prediction of components’ position and drastically increases the peaks in acceleration and reaction moments at the joints. Moreover, the system’s response clearly tends to be nonperiodic when a clearance joint is included in the simulation.

Từ khóa


Tài liệu tham khảo

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Thông tin xuất bản

Journal of Computational and Nonlinear Dynamics

Tập 1 Số 3

240-247

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