Theoretical analysis on stiffness and damping characteristics of metal rubber
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摘要: 针对金属橡胶构件加工工艺特点,以金属丝螺旋卷为金属橡胶构件的微元体结构.根据金属丝螺旋卷之间不同的接触状态,以圆柱压缩螺旋弹簧理论为基础,基于材料力学和库仑摩擦模型,考虑摩擦力的影响,建立金属丝螺旋卷微元体结构的力学模型.通过对微元体接触状态和接触对数目的分析,从理论上解释了金属橡胶的非线性刚度及阻尼产生的机理.该模型从细观的金属丝螺旋卷微元体上描述了金属橡胶迟滞特性的物理本质,为预测和分析金属橡胶的刚度、阻尼特性和设计金属橡胶构件提供了有效的理论基础.Abstract: The theoretical research on hysteretic characteristic and nonlinear stiffness and damping characteristics of metal rubber was performed. Wire helix was considered as the micro-element structure of metal rubber by analyzing the characteristics of processing components of metal rubber. A mechanical model of wire helix was established based on the material mechanics and the coulomb friction model. The contact states of wire helix were also considered in this model which combined with the impact of friction to cylindrical compression coil spring theory. It was easy to explain the mechanism of hysteresis loop and the nonlinear stiffness and damping characteristic of metal rubber by analyzed contact states and contact numbers of micro-element wire helix. This model was valuable for the analysis of the material mechanics and the design of metal rubber. It provides theoretical support for the further engineering application of metal rubber in the field of vibration reduction.
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Key words:
- metal rubber /
- wire helix /
- nonlinear stiffness /
- hysteresis curve
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