Identification of slip and micro-vibro-impact forces at a frictional support using force-state mapping technique
Publish place: 2nd International Conference on Acoustics and Vibration
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISAV02_160
تاریخ نمایه سازی: 26 اسفند 1391
Abstract:
Beams, as the most widely used structures in the engineering applications, are usually subjected to different boundary conditions. There are several contact mechanisms developing at the interface of the beams’ boundaries that change the nature from linear to nonlinear when the amplitude of the structural vibration increases. Two of the most important nonlinear mechanisms at the contact boundaries are micro/macro slip and micro-vibro-impact mechanisms affecting the dynamic response of the structures. This paper deals with the identification of the parameters of the micro slip and micro-impact models at the frictional support of a nonlinear beam that is modeled using Euler-Bernoulli beam theory by force-state mapping method. The identified tangential and normal forces are employed to determine the parameters of the Valanis and Hunt-Crossley models, respectively.It is further shown that the tangential stiffness of contact interface decreases as the excitation level increases.
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Authors
Mohammad Bazrafshan
Mechanical Engineering Department, Tarbiat Modares University, Tehran, Iran
Hamid Ahmadian
Center of Excellence of Solid Mechanics and Dynamics, Iran University of Science and Technology, Tehran, Iran
Hassan Jalali
Department of Mechanical Engineering, Arak University of Technology, Arak,