Traditional vibration feeders are mainly driven by electromagnet, which has the deficiency such as large volume, heavy mass, complex structure and loud noise.
电磁振动送料器在工业自动化生产线上已得到了广泛的应用，但其存在噪音大、结构复杂等缺点。
Centrifugal hydrogen compressor has problems of high rotating speed, complex structure and high difficulty in vibration cause analysis.
离心式氢气压缩机转速高、结构复杂、振动原因分析难度高。
The second test aims to a motor frame, we can conclude from the experiment that the instrument can analyze multiple modes of complex structure and display its modal vibration shapes.
其次对一摩托车架进行了试验模态分析，试验表明仪器能较好地分析出车架的多阶模态，并显示出其模态振型。
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