17 research outputs found
System Identification of Vibration Systems Using Sensitivity Analysis (2nd Report,Application to a Rigid Body System Supported by Springs)
Estimation of Rotation Mode Shapes by Use of Numerical Analysis (How to Select Mode Shapes to Be Combined)
Effect of Spot Welding Location Variability on Vibration Characteristics of Plate Structures
Spot welds are widely used to join plate structures such as an automotive body and the vibration characteristics of the
whole structure are affected by the spot welded joints. For the spot welded structure, the actual spot welding location is
often misaligned from the design specific location. In this paper, we investigate the effect of welding location variability
on the vibration characteristics of plate structures based on Fuzzy finite element method (FFEM) with Monte Carlo
simulation. From the membership functions of the natural frequencies from the FFEM and the histograms of the natural
frequencies from the interval analysis in the FFEM, we examine the modes that are strongly affected by welding
location variability and the locations that strongly affect the vibration characteristics. As an example structure, the
structure consisting of hat section steel plates joined together by 20 spot welds at the flanges is used