摘要
以二自由度振动系统为例,将多个频率下主振动系统的幅频值叠加来构造目标函数,选取合适的最优化方法优化设计动力吸振器的参数,并通过求解、分析振动系统的频域响应和时域响应,比较了设置动力吸振器前后以及取不同频率间隔时动力吸振器的减振效果.结果表明,随着频率间隔的减小,动力吸振器的减振效果变好,但当频率间隔减小到一定程度时,动力吸振器的减振效果变化不再明显.对二自由度振动系统吸振器参数优化设计的思想可以推广到复杂多自由度振动系统中,为随机激励下的动力吸振器参数优化设计提供了一种实用、有效的方法.
By taking a two-degree-freedom vibration system for example, this paper made the summation of response amplitude of the primary vibration system under different frequency as objective function, used the appropriate optimization method to choose and optimize dynamic vi- bration absorber parameters; and by working out and analyzing the frequency domain and time - domain response of vibration system, this paper contrasted the effect of different frequency in- tervals. The results showed that the smaller the frequency intervals are, the better the effect of the DVA is; but the effect of DVA will not change obviously when the frequency intervals are too small. By optimizing the parameters of a two-degree-freedom vibration system and analyzing the results, this paper elaborated a thought that can be used to the optimization of parameters of complicated multi-degree-freedom vibration system, offered a practical and effective method for optimization of Vibration Absorber parameters under random excitation.
出处
《山东理工大学学报（自然科学版）》
CAS
2015年第3期8-10,14,共4页
Journal of Shandong University of Technology:Natural Science Edition
基金
国家自然科学基金资助项目(51275280)
关键词
动力吸振器
参数优化
随机激励
dynamic vibration absorber
parameters optimization
random excitation
