摘要
液固混合介质隔振器是一种基于新型机理的隔振装置，主要由波纹管容器与浸于液体中的弹性单元体组成，其轴向刚度可近似为分段双线性刚度。针对具有这种刚度特性的隔振器，主要从动力学角度提出了具体设计方法，解决了系统响应求解及跳跃现象的预防等问题。首先采用平均法及其含直流项的修正方法分析了隔振系统的非线性频响特性及各参数对固有频率的影响，而数值仿真验证了解析方法的正确性。进而为了避免跳跃冲击，基于频响方程给出了单元体数量等参数临界值的计算方法。
Abstract
Solid and Liquid Mixture (SALiM) vibration isolator is a new technology on passive vibration control and its axial stiffness can approximate to be bilinear. The paper discusses the design procedures of the isolator from the view of dynamics and gives the nonlinear frequency response function (NFRF) by analytic method. First of all, the dynamic model of the vibration system should be established. Then an amendment to the first-order average method allows one to investigate the approximate solution of nonlinear system. In order to ensure validity of the analytical method, a numerical reference is provided. According to the plot of the NFRF, one can find that the jump phenomenon exists in some range. And this nonlinear phenomenon caused by piecewise linear stiffness may bring impact to equipment which should have been protected from vibration and shock. In order to avoid the emergence of the defect, the following discussion begins with the NFRF which allows one to determine the critical values of parameters, such as critical quantity of the elastic solid element.
Keywords: vibration isolation; piecewise bilinear; average method; frequency response; jump phenomenon
关键词
隔振 分段双线性 平均法 频率响应 跳跃
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Key words
vibration isolation /
piecewise bilinear /
average method /
frequency response /
jump phenomenon
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高 雪 陈 前 .
液固混合介质隔振器的响应计算与防跳跃设计[J]. 振动与冲击, 2013, 32(12): 150-153
X. Gao;Q. Chen;H. D. Teng.
Frequency Response and Jump Avoidance of Solid and Liquid Mixture Vibration Isolator[J]. Journal of Vibration and Shock, 2013, 32(12): 150-153
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