摘要
振动试验台是用于模拟真实振动环境的重要设备,通过建立六自由度变胞振动试验台测试系统、动力学模型及运动方程,应用ANSYS Workbench软件对振动台进行静力学分析,应用模态分析和谐响应分析模块对蛇形板簧与动平台进行动态特性分析,避免薄弱部件固有频率接近振动台工作频率而发生共振。结果表明:蛇形板簧最小共振频率发生于480 Hz附近,动平台最小共振频率发生于450 Hz附近,都远大于振动台正常工作频率:50~60 Hz,满足使用要求,为50~200 Hz机械振动台及超过2000 Hz的超声波振动时效设备结构设计提供理论依据;并对未来多维振动设备的结构设计及工作性能分析提出展望。
A vibration test-bench is an important equipment for simulating vibration environment.A six-degree-freedom vibration test bench in metamorphic mechanism was designed,for which dynamic model and motion equation were used and static analysis performed in ANSYS Workbench software,and modal analysis applied.The applied modal analysis and harmonic response analysis were conducted to analyze the dynamic characteristics of the serpentine leaf spring and the moving platform to avoid resonance of the natural frequency of weak component close to the operating frequency of the test bench.Results show that the minimum resonance frequency of the serpentine leaf spring occurred near 480 Hz,and the minimum resonance frequency of the moving platform near 450 Hz,which were much greater than the normal working frequency of 50~60 Hz.The outcome of this study may provide a theoretical basis for the structural designs of 50~200 Hz mechanical vibration bench,and over 2000 Hz ultrasonic vibration aging equipment.At last,the future structural design and performance analysis of multi-dimensional vibration equipment were proposed.
作者
王成军
严晨
段浩
WANG Cheng-Jun;YAN Chen;DUAN Hao(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines College of Mechanical Engineering,Anhui University of Science and Technology,Huainan 232001,China)
出处
《科学技术与工程》
北大核心
2020年第10期3874-3880,共7页
Science Technology and Engineering
基金
安徽省科技重大专项项目(16030901012)
安徽省自然科学基金面上项目(1708085ME98)
淮南市高校创新人团队专项计划项目(2017A054)
国家创新方法工作专项(2018IM010500)。
关键词
变胞机构
振动试验台
模态分析
谐响应分析
metamorphic mechanism
vibration test bench
modal analysis
harmonic response analysis