【摘要】 分子弹簧隔振器是一种以水和疏水沸石颗粒为工作介质的新型隔振器,该隔振器具有高静低动的分段刚度特性。首先以Laplace方程为基础模拟水侵入疏水微孔的过程,建立了分子弹簧刚度的力学模型,并通过准静态试验验证了该模型的有效性。随后在刚度的力学模型的基础上建立了分子弹簧隔振系统运动方程,采用平均法计算了分子弹簧隔振器的主共振幅频响应,采用基于等效线性化方法的接缝法计算了大振幅情况下的幅频响应。最后,以能量传递率为指标评价了分子弹簧隔振系统的隔振性能。研究表明分子弹簧隔振器具有优于传统的线性隔振器的隔振性能。更多还原

【Abstract】 Molecular spring isolator(MSI)is a novel vibration isolation technology which consists of water and hydrophobic zeolites as working medium and possesses high-static-low-dynamic stiffness.MSI has been invented in recent years but it needs further development in dynamics theory.Firstly,a mechanical model based on Laplace-Equation is established by simulating water intrusion into hydrophobic pores.The mechanical model is verified by aquasi-static experiment.To investigate the dynamic properties,the equation of motion of a single degree of freedom system supported by a molecular spring isolator is established.Averaging method is utilized to evaluate the frequency response function of primary resonance.Matching method based on an equivalent piecewise linear system is also utilized to evaluate the frequency response function for large vibration amplitude.Finally,the vibration isolation properties of molecular spring isolator are verified by energy transmissibility and the result shows that the molecular spring isolator provides better vibration isolation properties than linear vibration isolators.更多还原