Characteristics Of Damping In Components Of
A Spot-welded Frame
Author(s)
S. Enoki, H. Andou, Y. Takimoto & T. Katayama
Abstract
This paper describes a damping ratio for each component of a spot-welded frame
composed of cold-rolled steel sheets. A spot-welded frame is used as part of an
automotive body and a cabin of construction machinery. Their damping ratios
need to be understood in design. The spot-welded frame is divided into spotwelded
flange parts and other portions. Damping ratios of these components
have been measured by impact tests. It was found that damping ratios of nonspot-
welded sheet metals have little dispersion and are independent of frequency
and shape. It was found that damping ratios of spot-welded flange members are
related to the spot-pitch and thickness. Additionally it was found that a damping
ratio of a spot-welded frame is smaller than that of a spot-welded flange member
under the same parameters and is larger than that of a non-spot-welded sheet
metal. It was found that the difference in their damping ratios depends on the
shape of the non-spot-welded sheet metal portion in a spot-welded frame. The
degree of the difference was clarified by our suggested method to evaluate the
damping ratio of a spot-welded frame.
Keywords: damping ratio, spot-welding, sheet metal, cold-rolled steel sheet,
impact test.
1 Introduction
Good riding quality is needed for a car and a construction machinery because the
operator rides on for many hours. Therefore, it is important to understand the
vibration behaviour in design. An automotive body and a cabin of a construction
Keywords
damping ratio, spot-welding, sheet metal, cold-rolled steel sheet,
impact test.
Related Book
Other papers in this volume
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