• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME international mechanical engineering congress and exposition >THE EFFECT OF STIFFNESS AND LOADING DEVIATIONS IN A NONLINEAR ISOLATOR HAVING QUASI ZERO STIFFNESS AND GEOMETRICALLY NONLINEAR DAMPING
【24h】

THE EFFECT OF STIFFNESS AND LOADING DEVIATIONS IN A NONLINEAR ISOLATOR HAVING QUASI ZERO STIFFNESS AND GEOMETRICALLY NONLINEAR DAMPING

机译：具有准零刚度和几何非线性阻尼的非线性隔离器的刚度和载荷偏差的影响

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Static deflections due to static loadings limit the isolation performance of linear vibration isolation systems. Therefore, quasi-zero stiffness (QZS) mechanisms, i.e. nonlinear isolators with high static and low dynamic stiffness characteristic, are used to decrease the natural frequency of the isolation structure and improve the isolation performance of the system while having the same loading capacity. However, the resulting system is highly nonlinear and unstable solutions may as well occur. Although increasing the amount of linear viscous damping in the system reduces the nonlinearity, it has adverse effect on the isolation region. Geometrically nonlinear damping is effective when the response of the isolation system increases; hence, isolation region is unaffected. Combination of position depended nonlinear damping and QZS mechanism eliminates highly input depended response of QZS mechanism. In this study, a single degree of freedom system with a nonlinear isolator having QZS mechanism and geometrically nonlinear damping is considered. The nonlinear differential equations of motion of the isolation system are converted into a set of nonlinear algebraic equations by using harmonic balance method, which are solved by using Newton's method with arc-length continuation. Several case studies are performed and the effect of stiffness and loading deviations on the isolation performance is studied.
机译：由于静态负载引起的静态偏转限制了线性隔离系统的隔离性能。因此，准零刚度（QZS）机构，即具有高静态和低动态刚度特性的非线性隔离器，用于降低隔离结构的固有频率，并提高系统的隔离性能同时具有相同的负载能力。然而，结果系统是高度非线性和不稳定的解决方案也可能发生。尽管在系统中增加线性粘性阻尼量减少了非线性，但它对隔离区产生不利影响。当隔离系统的响应增加时，几何非线性阻尼是有效的;因此，隔离区不受影响。位置依赖的非线性阻尼和QZS机构的组合消除了QZS机制的高度输入依赖性响应。在该研究中，考虑了具有具有QZS机构和几何非线性阻尼的非线性隔离器的单一自由度系统。通过使用谐波平衡方法将隔离系统的运动运动的非线性微分方程转换为一组非线性代数方程，通过使用牛顿的弧长延续来解决。进行了几种案例研究，研究了刚度和加载偏差对隔离性能的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号