Research on Dynamic Stability Optimization of Rock Spreader considering Prevention of Geological Subsidence and Local Collapse in Reclamation Area
Table 5
Description of the first six natural frequencies and vibration modes of receiving boom.
Order
Natural frequency (Hz)
Total amplitude (mm)
Mode shapes
1
3.73
0.27
The midspan is bent in the positive direction of the y-axis
2
4.12
0.27
The midspan is bent in the positive direction of the x-axis
3
5.02
0.58
The whole boom is slightly twisted, and the head of the receiving boom is twisted along the x-axis
4
6.78
0.75
The tail of the boom turns to the positive direction of the x-axis, and the head of the boom turns around the y-axis
5
7.60
0.37
The middle of the boom is twisted around the z-axis, and the head is about the x-axis
6
10.46
0.36
The position near the tail of the boom turns to the negative direction of the x-axis, and the position near the head turns to the positive direction of the x-axis
