✦ LIBER ✦

IMPROVED ESTIMATES FOR THE ENERGY CHARACTERISTICS OF A VIBRATING ELASTIC STRUCTURE VIA THE INPUT IMPEDANCE AND MOBILITY: EXPERIMENTAL VERIFICATION

✍ Scribed by YU.I. BOBROVNITSKII; M.P. KOROTKOV

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 364 KB
Volume: 247
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.2001.3778

No coin nor oath required. For personal study only.

✦ Synopsis

An e$cient method for estimating the vibration energy characteristics (such as the potential energy, kinetic energy, loss factor, etc.) of a forced vibrating structure proposed earlier (Journal of Sound and <ibration 1998, 217, 351}386) [1] is improved and validated numerically and experimentally. The main problem of experimental implementation of the method*di!erentiation of the measured input impedance and mobility with noise present*is solved with the help of the PadeH approximation by ratios of polynomials. The results of computer simulation and laboratory experiment conducted on a #exurally vibrating beam show that the improved method gives reliable estimates of the vibration energy characteristics at low and middle frequencies.

2001 Academic Press

📜 SIMILAR VOLUMES

ESTIMATING THE VIBRATIONAL ENERGY CHARAC

ESTIMATING THE VIBRATIONAL ENERGY CHARACTERISTICS OF AN ELASTIC STRUCTURE VIA THE INPUT IMPEDANCE AND MOBILITY

✍ Yu I. Bobrovnitskii 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 387 KB

Several equations are proposed which relate the time-average energy of a forced vibrating linear structure to the structure input impedance and mobility. When the structure is driven at one point, the equations allow one to obtain the kinetic and potential energy, loss factor and other energy charac