Development of Polynomial Model for Cantilever Beam with Breathing Crack

详细信息    查看全文

• 作者：J. Prawin^a ; ^{prawinpsg@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; A. Rama Mohan Rao^b
• 关键词：bilinear systems ; fatigue cracks ; polynomial idealization ; nonlinear system identification
• 刊名：Procedia Engineering
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：144
• 期：Complete
• 页码：1419-1425
• 全文大小：255 K

文摘

Nonlinear phenomena are widely encountered in practical engineering applications. A typical example is fatigue cracks which open and close under dynamic loadings, exhibiting breathing characteristic and introducing bi-linearity into structures. In this paper, we mainly focus on the idealization of bilinear phenomena by a polynomial function of the desired order which has a greater significance in nonlinear parametric system identification. The proposed polynomial idealization of restoring force of the bilinear problem is validated by comparing the frequency response and displacement time history response of a numerically simulated single degree of freedom cantilever beam with a single-edged breathing crack excited under harmonic loading.