摘要
阻尼系数的确定对于隔振设计非常重要。针对大阻尼黏性流体微振动隔振器,提出一种确定三参数模型阻尼系数的机械阻抗等效理论与测试方法,将三参数模型简化为等效的便于试验测试的两参数隔振模型。将由自行设计的试验系统测量得到的阻尼系数和刚度系数输入到ADAMS仿真模型中,得到等效阻尼系数,并与直接采用迟滞环法得到的隔振器的等效阻尼系数进行对比分析。研究结果显示,两种方法得到的结果具有良好的一致性,证明了本文方法的可行性和可用性。本文方法还可得到以往传统方法难以得到的动态阻尼系数随频率的变化规律,对于隔振设计具有重要的参考价值。由于提出简化的等效模型,使得隔振器阻尼系数的测试更加快捷方便,本方法可推广应用于具有更多参数的隔振器阻尼系数的测量。
The determination of the damping coefficient is very important for vibration isolation design.For large damping viscous fluid micro-vibration isolators,this paper presents a new equivalence theory and method to measure the damping coefficient of a three-parameter isolation model.Based on the equality of mechanical impedance,an equivalent two-parameter physical system which can be easily tested is obtained from the three-parameter isolation model.The measured damping coefficient and stiffness coefficient from a self-designed test setup are input into an ADAMS simulation model,and then the equivalent damping coefficient of this simulation is compared with that directly received from a hysteretic loop test.The results show great consistency between simulation and measurement and thus prove the validity and feasibility of this method.The variation of dynamic damping coefficient with frequency is also obtained,which is difficult for traditional methods to obtain and will be valuable for the design of vibration isolation.Thus,it becomes convenient to conduct measurements of damping coefficients of micro-vibration isolators because of the simplified model.Furthermore,the method can also be applied to isolators with more parameters to measure damping coefficients.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2014年第2期454-460,共7页
Acta Aeronautica et Astronautica Sinica
基金
CAST创新基金(CAST201208)
国防基础科研计划(B2120110011)~~
关键词
微振动隔振器
三参数模型
两参数隔振系统
机械阻抗
迟滞环
micro-vibration isolator
three-parameter model
two-parameter isolation system
mechanical impedance
hysteretic loop
