附加非线性阻尼夹层的间隙弹性机构减振分析  

Vibration Control of Elastic Mechanism with Adhering Nonlinear Damping Alloy Constraint Layer

作　　者：王国庆[1] 左建昌[1] 王帑[1] 刘宏昭[2] 

机构地区：[1]长安大学教育部"道路施工技术与装备"重点实验室,陕西西安710064 [2]西安理工大学机仪学院,陕西西安710048

出　　处：《机械传动》2008年第4期72-75,共4页Journal of Mechanical Transmission

基　　金：陕西省自然科学基金资助项目(2005E206)

摘　　要：为了实现含间隙弹性机构低成本的振动控制,提出了部分附加约束阻尼合金夹层的方法。采用符合接触边界条件的非线性弹簧阻尼模型描述碰撞分离过程,建立了多间隙连杆机构的刚体动力学模型;用曲线拟合描述阻尼合金的损耗因子随应变变化的规律,在考虑剪切的基础上给出了依赖于应变和频率非线性阻尼本构关系式;在计入阻尼层非线性阻尼特性和普通材料结构阻尼特性的2节点10自由度的夹层单元模型的基础上,建立了部分附加阻尼合金夹层的系统运动弹性动力学方程。计算结果说明了所提方法对控制含间隙弹性机构的振动是有效的。It is presented to realize the low cost vibration control that method of adhering nonlinear damping alloy constraint layer partly to the component of mechanism with clearance joints.The nonlinear spring damping contact model is adopted to describe the contact force of the clearance joint elements,based on it,the dynamic model of the crank rocker mechanism with clearance joints is established.By using curve fitting describe the rule of the dissipation factor of damping alloy changing with stress and taking account of the sheared,the nonlinear constitutive relation was given depending on the stress and strain base on the equivalent viscous damping theory,then deduced a type of composite element model with two nodes and ten degrees of freedom,which had the characteristics of nonlinear damping and structural damping,established the dynamic model of the elastic mechanism partly adhering nonlinear damping alloy constraint layer.The methods presented are feasible by numerical simulation.

关 键 词：机械工程 振动控制 间隙 阻尼合金 本构关系 

分 类 号：TB535[理学—物理]