ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The dynamic characteristics of a TV tower with 610m in height is actively analyzed byusing commercial package ANSYS in this study. The mode selection is carried out by determining themodal mass participation ratio. The observations made based on numerical investigation demonstratethat the natural frequencies of the high rise unsymmetrical tower are substantially close and the modaldisplacement of the antenna is much larger than that of the major tower. In order to select the majormode shapes, the modal mass participation ratios of the first 30 modes are calculated and at least first10 mode shapes should be considered when investigating the seismic responses. It is seen that themode shapes whose vibration directions are paralleled to the short axis of the elliptical core tube arecritical to the structural seismic responses. In this direction, the mass participation ratios of the firstthree mode shapes add up to 0.63, the 10 modes, the sum of whose modal participation ratio is 0.8184,are selected in order. Therefore, at least 10 modes should be involved in the analysis of structuralseismic responses
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.33-37.1201.pdf
