Abstract
This paper covers the investigation of a nonlinear jointed structure in the frequency domain. Due to frictional nonlinearities the behavior of that system is approximated using the Multiharmonic Balance Method (MHBM). Two models of different complexity are presented. The first is a simple three degree-of-freedom model which is valid because of the special design of the structure. This model enables a very fast and accurate prediction of the stationary behavior of the real system. In order to attain a more general way of modeling structures including joints, the second model is a Finite Element (FE) model. For the discretization of the contact plane, “Zero Thickness” (ZT) elements are implemented. These elements allow the application of nearly arbitrary constitutive laws for describing the dynamic joint behavior. Here a coupled three dimensional contact law including dry friction effects is applied and the needed partial derivatives for the MHBM procedure are given analytically. Using measurements from the real structure and performing a model updating process, the parameters of the two presented models are estimated. The calculation results are compared to measurements in the frequency as well as in the time domain.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.