On the importance of Geometric Nonlinearity in Forced response Analysis of Structures with Friction Contact
Publish place: 10th International Conference on Acoustics and Vibration
Publish Year: 1399
نوع سند: مقاله کنفرانسی
زبان: English
View: 409
This Paper With 8 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ISAV10_075
تاریخ نمایه سازی: 18 اسفند 1399
Abstract:
The effect of ignoring geometric nonlinearity in a structure with friction contact on the forced response analysis is investigated. Forced response prediction of structures with friction non-linearity is usually performed by assuming geometrically linear structures. Although the dis-sipated energy via friction contact reduces the amplitude of vibrations and avoids large dis-placements, there are cases in which the structure still experiences geometric nonlinearity. In this study, the forced response analysis of a clamped beam with friction contact at its free end is computed by geometrically linear and nonlinear model. The analysis is performed in Fre-quency domain using Alternating Frequency-Time method. Nonlinear contact and elastic forces are obtained using a state of art contact element and nonlinear Finite Element formula-tion, respectively. The amplitude of vibration and hysteresis loop are compared to demon-strate the importance of geometric nonlinearity. The comparison of results shows considera-ble differences even in case of very small amplitude of vibration.
Keywords:
Authors
Fahimeh Mashayekhi
Department of Aerospace Engineering, Amirkabir University of Technology, ۴۲۴ Hafez Ave, Tehran, Iran
Ali Salehzadeh Nobari
Department of Aerospace Engineering, Amirkabir University of Technology, ۴۲۴ Hafez Ave, Tehran, Iran