摘要
提出了用锌基阻尼合金材料作为构件实现含间隙弹性机构振动控制的方法。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,建立了多间隙平面连杆机构的动力学模型;用二次曲线函数拟合实验所得锌基阻尼合金的损耗因子随应变变化的规律,由等效粘性阻尼理论,给出了一种依赖于应变和频率的非线性阻尼本构关系式;推导出了含间隙弹性连杆机构单元运动微分方程和系统运动弹性动力学方程。计算结果说明锌基阻尼合金材料应用于含间隙弹性机构的振动控制中是可行的。
The nonlinear spring damping contact model was adopted to describe the contact force of clearance joint elements. Based on it, the dynamic model of crank rocker mechanism with clearance joints is established. By using conic, the changing rules of dissipation factor of Zn-27Al-1Cu damping alloy with stress are expressed, the nonlinear constitutive relation is given depending on the stresses and strains based on equivalent viscous damping theory, then a type of dynamic element model and dynamic model of the elastic mechanism using Zn-27Al-1Cu damping alloy material are deduced. The methods presented are feasible by numerical calculations.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2005年第11期993-996,共4页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50075068)
关键词
弹性机构
本构关系
阻尼合金
间隙
振动控制
damping alloy
clearance
elastic mechanism
vibration control
constitutive relation
