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http://dx.doi.org/10.5762/KAIS.2013.14.7.3577

Analytical Study on Vibrational Properties of Vibro-hammer  

Lee, Seung-Hyun (Department of Civil Engineering, Sunmoon University)
Kim, Eung-Seok (Department of Civil Engineering, Sunmoon University)
Yoon, Ki-Yong (Department of Civil Engineering, Sunmoon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.7, 2013 , pp. 3577-3581 More about this Journal
Abstract
In order to analyze a pile constructed by vibro-hammer, vibrational characteristics of vibro-hammer should be investigated first. Analytical studies were conducted in order to investigate vibrational properties of vibro-hammer. It is thought that the concept of acting the spring force to the pile head should be replaced by the concept of considering the lumped mass of the exciter and the pile. For the situation of free vibration, spring force increase with increase of spring constant and the amplitude is little affected by the spring constant. Also for the situation of free vibration, amplitude is inversely proportional to the increase of mass of the exciter and it can be seen that spring force increase with amplitude by the same ratio. It can be seen that directions of the spring force and displacement are opposite to that of rotating mass.
Keywords
Vibro-hammer; Spring force; Spring constant; Amplitude; Mass of the exciter;
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