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The main design elements include: the small of Vibration test bench of general structure design, test-bed vibration system design, the impact on the structure of the interference between the different vibration. the small of Vibration test bench preliminary selection scaffolding structure, lower degree of complexity of this structure, and has good scalability and extensibility. Scaffold material selection No. 65 steel, high carbon spring steel.After the heat-treated of steel or cold hardening has high strength, hardness and elasticity, cold deformation plasticity low, weldability is bad, Generally use oil quenching, large cross-section parts by water quenching oil cooling or normalizing for hardening. No. 65 steel is manufactured springs, coil springs, various gaskets, clutches, and manufacturing general machinery shaft, roller, eccentric ect.Preliminary selection of small motor driven eccentric wheel, analog sinusoidal vibration.
This structure is the most convenient in stage, Meanwhile sinusoidal vibration is vibration common form of vibration. The disadvantage is that the form of vibration is too simple, and can not simulate high-frequency vibration. This solution is to follow the choice of electromagnetic excited vibration of the vibration mode. Electromagnetic excitation mode has high frequency response , it can make the specimen It allows specimens to have irregular and high frequency of vibration, to better fit the natural environment vibration.
After determining the form of vibration.decide the need to test the vibrating structure (simply supported beam, cantilever beam is pided into equal strength, and equal moments beams, cable) and the various parts for the preliminary data preparation and calculation.After the structures and dimensions of all the pieces were built, SolidWorks was used to prepare drawings of the workpieces and conduct 3D virtual assembly with a revision of some data, the final CAD drawing was finished.
Keywords: Vibration: test bench: Virtual assembly: Excitation source
目录
1 设计总说明 1
1.1 影响、目的、研究方向及要达到的性能指标 1
1.2 国内外的发展概况及存在的问题 1
1.2.1 振动实验台概述 1
1.3 本课题的指导思想 2
2 功能分析及性能指标 3
2.1 功能分析 3
2.2 小型振动实验台需要达到的性能指标 3
2.3 小型振动实验台实验的过程 4
3 小型振动试验台方案选择 5
3.1.激振源选择 5
3.2 小型振动试验台结构设计 8
3.2.1 安装支架及底座 8
3.2.2 梁的固定方式及结构 9
3.2.3 悬索的固定 10
3.2.4 模态圆盘固定 10
3.3小型振动试验台激振源要求 11
3.4 小型振动试验台传感器安装方式 11
4 小型振动试验台振动模型设计 12
4.1 简支梁 12
4.2 等截面悬臂梁 15
4.3 金属圆盘模态 17
5 有限元检验及分析 18
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