Study on Experimental Identification and Alternative Kernel Functions of Nonviscous Damping

• DOI: 10.1142/s1758825122500624
• Publication Date: 2022-06-24T08:28:25Z
• Authors: Renjie Shen; Xiangdong Qian; Jianfang Zhou; Chin-Long Lee; Athol Carr; Roger Nokes
• Keywords: Damping ratio; Kernel (algebra); Thermoelastic damping; Damping torque; Natural frequency

Nonviscous damping is represented by the convolution integral of time history velocity and kernel function. model may correctly represent energy dissipation character linear system for multiple-choice functions. This paper outlines a procedure identifying relaxation parameter ratios cantilever beams with nonviscous in domain. In procedure, approximate value can be identified continuous wavelet transform (CWT) firstly. Then natural frequency tested structure obtained through eigensystem realization algorithm (ERA). Finally, are sensitivity method using initial values from CWT ERA. The proposed identification identify parameters numerical example small error. Then, displacement measured experiment used procedure. It shows that good estimates choosing suitable Identification results four different functions discussed. function analysis results. As result, this analyzes causes, presents relevant suggestions recommended research on will increase application dynamic actual structures.