发现板在两端简支、中点联结松动时，结构首先出现屈曲失稳，而不会发生颤振失稳。

For pined_pined, loosed midpoint support plate, it is found that the plate's buckling instability will happen first while the flutter instability will disappear.

youdao

支架：有两根枢轴联结上承板、中承板和下承板之间的距离籍支承套固定为25毫米。

Bracket: it gets two pivots to contact upper support plate, mid-support plate and lower support plate and fix the distance 25mm.

youdao

发现板在两端简支、中点联结松动时，结构首先出现屈曲失稳，而不会发生颤振失稳。

For pined_pined, loosed midpoint support plate, it is found that the plates buckling instability will happen first while the flutter instability will disappear.

youdao