首页|Identification of Systems Containing Nonlinear Element Using Constant Response Vibration Tests
Identification of Systems Containing Nonlinear Element Using Constant Response Vibration Tests
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
维普
Nonlinear behavior is important in the vibration test of engineering structures.In this study,a constant response vibration test is proposed for nonlinear element extraction.The method is based on the principle of Harmonic Balance Method(HBM).The stiffness or damping can be regarded as constant for particular steady displacement or velocity response.The displacement or velocity is controlled as a constant in the test.Then the measured Frequency Response Function(FRF)is obtained.The equivalent stiffness or damping is estimated using FRFs for a particular vibration response level.The displacement-dependent stiffness and velocity-dependent damping are fitted to describe the unknown non-linearity.The nonlinear spring and damping force can be obtained by combining the fitting results with HBM using first-order expansion.Constant response vibration test is illustrated through experimental setup to verify its effectiveness.Experimental results show that the procedure is capable of achieving an accurate parameter identification of nonlinear damping and stiffness,which is hopeful for industrial application.
non-linearity identificationsinusoidal sweepmodal testconstant responsefrequency response function
万方数据
维普
