| Titre : | Cable modal parameter identification. I : theory (2009) |
| Auteurs : | Wei-Xin Ren, Auteur ; Wei-Hua Hu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of engineering mechanics (Vol. 135 N°1, Janvier 2009) |
| Article en page(s) : | pp. 41-50 |
| Note générale : | Mécanique appliquée |
| Langues : | Anglais |
| Tags : | Construction equipment Cables Stiffness Vibration Parameters Least squares method Theories. |
| Résumé : | Cable modal parameters (natural frequencies and damping ratios) that represent the cable inherent dynamic characteristics play an important role in the construction, vibration control, condition assessment, and long-term health monitoring of cable-supported structures. The existing options to identify cable modal parameters through vibration measurements are somewhat limited. For this purpose, a cable dynamic stiffness based method is presented to effectively identify the cable modal parameters. In the first part of this two-part paper, the cable dynamic stiffness is analytically discussed for a viscously damped, uniform, inclined sagging cable supported at the lower end and subjected to a harmonically varying arbitrary angle displacement excitation in an arbitrary angle at the upper end when the cable is assumed to have a parabolic profile at its position of static equilibrium. Special attention is paid to the physical meaning and significance of every part of the frequency-dependent closed-form cable dynamic stiffness. Comprehensive numerical analyses have been carried out and a simplified cable dynamic stiffness is proposed for the purpose of identifying the cable modal parameters with a good accuracy over a wide range of frequencies. |
| DEWEY : | 620.1 |
| ISSN : | 0733-9399 |
| En ligne : | http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000135000001000041000001&idtype=cvips&gifs=Yes&ref=no |
