滑动梁结构的变刚度分析以及应用于振动控制的初步考虑

文章分析了几种形式的滑动梁的刚度特性,分别给出了它们的滑动刚度以及静止刚度的计算公式;分析了静止刚度与滑动刚度的转化条件,并对相同位置的滑动直梁与滑动曲线梁的刚度进行了比较。结果显示:滑动梁的滑动刚度取决于梁的材料、尺寸以及放置的角度;滑动梁的静止刚度与滑动刚度有较大差异,静止刚度一般远大于滑动刚度;曲线梁相比于直线梁,在相同放置的情况下,具有更高的初始滑动刚度;随着梁滑动后与垂直方向夹角的增大,滑动刚度逐渐减小。滑动梁的刚度变化特性可以用于振动控制中,文末给出了减振应用的一些思路。

Variable stiffness analysis for slide beam stmctures and preliminary considerations in vibration control

This paper presents a variable stiffness analysis for several slide beam structures, and the computation formulas for the slide stiffness and the static stiffness of the slide beam strcutures. The relations between the slide stiffness and the static stiffness are obtained, with a comparison of the stiffnesses between the straight beam and the curved beam at the same position. It is shown that the slide stiffness depends on the materials, the dimension and the position angle of the beam. The static stiffness is much different from the slide stiffness, and generally the static stiffness is much larger than the slide stiffness. At the same position, the initial slide stiffness of a curved beam is higher than that of a straight beam. As the angle varies with the beam sliding, the silde stiffness gradually decreases. The stiffness characteristics of the slide beam may be used in the vibration control, and some suggestions for vibration reduction are given.