带有斜向惯容的悬挂式隔振系统动力学特性仿真研究

A simulation study on the dynamic characteristics of a suspension vibration isolation system with a diagonal inerter

首先,将惯容器、阻尼器和弹簧进行组合,设计实现全并联隔振单元,并将其斜向布置,构成新型悬挂式隔振系统;其次,以软件ADAMS与MATLAB联合仿真的方式,构建带有斜向惯容器、阻尼器和弹簧的悬挂式隔振系统以及仅带有斜向阻尼器和弹簧的悬挂式隔振系统的仿真模型,并对两种隔振系统进行对比研究,探讨斜向惯容的作用;然后,针对带有斜向惯容器、阻尼器和弹簧的悬挂式隔振系统的加速度传递特性进行研究,改变隔振系统参数观察传递率曲线变化,并探讨了在ADAMS环境下以数值方法、半数值半模型方法表示惯容结构的可行性;最后,以半数值半模型的方法表示惯容,在随机激励下对带有斜向惯容器、阻尼器和弹簧的悬挂式隔振系统中的惯容施加速度与相对速度、加速度与相对速度、相对加速度与相对速度三种半主动控制方式,探讨不同控制方式对隔振性能的影响。研究结果表明,斜向惯容器可以改善悬挂式隔振系统对低频振动的隔离效果,但会增加高频部分的传递率,相对加速度与相对速度和加速度与相对速度的控制方式可以明显提高悬挂式隔振系统对随机激励的衰减效果。

Firstly,the inerter,damper,and spring are combined to design a parallel vibration isolation unit,and they are arranged diagonally to form a new suspension vibration isolation system(SVIS).Secondly,through the joint simulation of ADAMS and MATLAB,simulation models of suspension vibration isolation systems with diagonal inerters,dampers,and springs(SVISIDS),as well as suspension vibration isolation systems with only diagonal dampers and springs,are constructed.A comparative study is conducted on the two types of isolation systems to explore the role of diagonal inerter.Then,the acceleration transmission characteristics of a SVISIDS are studied,and the transmission rate curve is observed by changing the system parameters.The feasibility of using numerical and semi numerical and semi model methods to represent inerter in the ADAMS is explored.Finally,the inerter is represented using a semi numerical and semi model method.Under random excitation,three semi-active control methods,namely velocity and relative velocity,acceleration and relative velocity,and relative acceleration and relative velocity,are applied to the inerter in a SVISIDS.The effects of different control methods on isolation performance are explored.The research results indicate that the diagonal inerter can improve the isolation effect of the SVIS on low-frequency vibration,but it will increase the transmission rate of the high-frequency part.The control method of relative acceleration and relative velocity,as well as the control method of acceleration and relative velocity,can significantly improve the attenuation effect of the SVIS on random excitation.