摘要
对一精密仪器支承平台结构的有限元建模、结构简化和约束处理做了分析和探讨,通过Combination14弹簧阻尼器单元等效模拟减振机构,对支承平台结构进行了随机振动响应分析,获得结构随机振动最大加速度、最大位移响应情况与减振弹簧刚度系数之间的关联性。为实现支承平台加速度与位移同时达到控制范围内的减振效果,改进设计了一种非线性减振机构,并基于ANSYS的接触单元数值模拟,进行时域动力学分析与验证,模拟结果表明非线性减振机构对支承平台结构的加速度与位移均具备良好减振效果。
A finite element model and its boundary conditions of supporting platform structure of an exact instrument are established in this paper.Damping mechanism of supporting platform structure is equivalent simulated by combination 14 spring-damper elements.On this basis,modal analysis and random vibration response analysis of supporting platform structure are calculated.Relation curves between maximum acceleration,displacement response of the structure of random vibration and stiffness coefficient of damping spring are given from calculation results.ln order to achieve both damping effect of accelera-tion and displacement,a linear damping mechanism is design and analyzed through the contact element simulation.
出处
《工业控制计算机》
2017年第10期110-111,115,共3页
Industrial Control Computer
基金
国家自然科学基金资助项目(11372295)
关键词
支承平台
基础激励
弹簧阻尼器
非线性减振
supporting platform,base excitation,spring-damper,nonlinear damping mechanism
