A four-bar linkage mechanism with links fabricated from symmetric laminates was studied. The mass matrix of the beam dement was obtained in light of the mass distribution characteristics of composite materials. The st...A four-bar linkage mechanism with links fabricated from symmetric laminates was studied. The mass matrix of the beam dement was obtained in light of the mass distribution characteristics of composite materials. The stiffness matrix of the beam element was derived from the constitutive equations of each layer and the relationship between the strain distribution and the node displacement of the beam element. The specific damping capacity of the beam element was analyzed according to the strain distribution of the beam element and the strain energy dissipation caused by vibration in each direction of each layer; and the damping coefficients were obtained according to the principle that the total energy dissipation of the beam element was equal to the work done by the equivalent damping force during a cycle of vibration, from which the damping matrix of the dynamic equations was obtained. Using the finite element method, the dynamic analytic model of the mechanism was obtained. The dynamic responses and natural frequency of the mechanism were obtained by simulation, respectively, and those of the simulation obtained by the proposed model were analyzed and compared with the results obtained by the conventional model. The work provides theoretical basis to a certain extent for the further research on nonlinear vibration characteristics and optimum design of this kind of mechanism.展开更多
SPIE-Vol.3672 01073681999年 SPIE 会议录,卷3672:无源阻尼与隔离=1999proceedings of SPIE,Vol.3672:Passive damping andisolation[会,英]/SPIE-The International Society for Op-tical Engineering.—1999.—376P.(EC)本会议录收...SPIE-Vol.3672 01073681999年 SPIE 会议录,卷3672:无源阻尼与隔离=1999proceedings of SPIE,Vol.3672:Passive damping andisolation[会,英]/SPIE-The International Society for Op-tical Engineering.—1999.—376P.(EC)本会议录收集了于1999年3月1～2日在美国加州新海岸召开的无源阻尼与隔离会议上发表的35篇论文,内容涉及各种阻尼系统的建模,MR-ER 阻尼器,无源压电陶瓷处理,隔离,无源——有源阻尼处理,无源部件,吸收能量复合接头性能估计及有限元法建模,弹性与粘滞弹性组件结构运动方程,用于综合阻尼复合板的定向阻尼材料。展开更多
基金Projects(50175031, 50565001) supported by the National Natural Science Foundation of China project (2003203) supported by the New Century Ten Hundred and Thousand Talent Project Special Foundation of Guangxi+1 种基金 project(0542005) supported by Guangxi Science Foundation project(205119) supported by the Key Project of Chinese Ministry of Education
文摘A four-bar linkage mechanism with links fabricated from symmetric laminates was studied. The mass matrix of the beam dement was obtained in light of the mass distribution characteristics of composite materials. The stiffness matrix of the beam element was derived from the constitutive equations of each layer and the relationship between the strain distribution and the node displacement of the beam element. The specific damping capacity of the beam element was analyzed according to the strain distribution of the beam element and the strain energy dissipation caused by vibration in each direction of each layer; and the damping coefficients were obtained according to the principle that the total energy dissipation of the beam element was equal to the work done by the equivalent damping force during a cycle of vibration, from which the damping matrix of the dynamic equations was obtained. Using the finite element method, the dynamic analytic model of the mechanism was obtained. The dynamic responses and natural frequency of the mechanism were obtained by simulation, respectively, and those of the simulation obtained by the proposed model were analyzed and compared with the results obtained by the conventional model. The work provides theoretical basis to a certain extent for the further research on nonlinear vibration characteristics and optimum design of this kind of mechanism.
文摘SPIE-Vol.3672 01073681999年 SPIE 会议录,卷3672:无源阻尼与隔离=1999proceedings of SPIE,Vol.3672:Passive damping andisolation[会,英]/SPIE-The International Society for Op-tical Engineering.—1999.—376P.(EC)本会议录收集了于1999年3月1～2日在美国加州新海岸召开的无源阻尼与隔离会议上发表的35篇论文,内容涉及各种阻尼系统的建模,MR-ER 阻尼器,无源压电陶瓷处理,隔离,无源——有源阻尼处理,无源部件,吸收能量复合接头性能估计及有限元法建模,弹性与粘滞弹性组件结构运动方程,用于综合阻尼复合板的定向阻尼材料。
