Order number

Natural frequencies (HZ)

Modes description

1

0.75410

The left and right part with large size has greater vibration amplitude than the middle part.

2

0.77060

The left side―backward, the right side―forward, doing antisymmetric vibration.

3

0.96608

The left and right―forward, the middle part―backward.

4

1.0888

The left, right and middle parts, in their own range, do forward and backward antisymmetric vibration.

5

1.3795

The middle part―backward, the left and right parts― forward, and the external side vibrates backward.