基于功率流的偏心激励气囊隔振系统压力优化

Research on pressure optimization in pneumatic vibration system excitated by eccentricity based on power flower

针对柔性基础上偏心激励作用复杂机械系统,利用子结构导纳矩阵法建立机器-柔性基础被动隔振系统数学模型,理论分析隔振系统的功率流传递特性,探讨不同的激励位置对传递到基础的功率流的影响。计算分析表明,偏心激励下可以激发多个振动模态,激发的振动模态越多,传递到基础的功率流越大。对于给定的激励位置,可通过调节隔振器的刚度来改变隔振系统的模态以降低基础的振动。以传递到基础的功率流最小为目标,对气囊隔振器的压力进行优化。优化结果表明,对于偏心激励,最优分布压力不是均匀分布,随着激励位置的变化,最优的压力分布不同。

For flexible base complex mechanical system by eccentric excitation,ultilize substructure mobility matrices method establish machinel-flexible base passive isolation system mathematical model,analyze the dynamical behavior of power flow transsimition,explore the influence of the power flow transimited to the base by divers eccentric excitation.Results indicate that eccentric excitation can excit multi dynamical mode,the more dynamical mode,the more power flow transimited to the base.For the known excitation location,we can adjust vibration isolation stiffness to alter isolation system mode to reduce the base vibration.Take power flow transited to the base minimum for target,optimize pneumatic vibration isolation pressure,the result indicate the optimization pressure distributing is not symmetrical,the excitation changed,the optimization pressure distributing alter.