... piece substructure 整体结构底座 rig substructure 钻机底座 elevating substructure 自升式底座 ...
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钻机底座立柱为箱形焊接结构，是整个钻机的支撑构件。
The column of drill base is a trunk welding structure, and it is important to support the whole drill.
详细介绍了这种钻机底座的改造方案、现场试验布置和测试方法。
The modification scheme, field test arrangement and test method are introduced.
对现役钻机底座做了现场振动测试，得到频响函数曲线及前10阶模态频率。
On-site vibration test of the servicing rig substructure is made, and the frequency response function curve and preceding 10 modes frequency are obtained.
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