Perforated rudder for inhibiting vortex excitation vibration and design method thereof

All-through pressure holes are formed in the tail edge of a rudder wing in the flow direction and the spanwise direction, a pressure surface and a suction surface are communicated, and the tapping principle is as follows: a) a tapping area is in front of the tail edge and behind 3/4 of the chord length of the wing; b) the aperture ratio (total aperture area/wing surface area) is not greater than 1%; c) multiple rows of holes are formed, and each row is porous; the design method comprises the following steps: determining a preliminary trepanning area according to the size of the rudder wing; calculating rudder wing surface area; according to the requirement that the total opening area is not larger than 1% of the surface area of the rudder wing, the total opening area limit value is determined; according to the total hole opening area, a plurality of hole opening schemes are set by taking the hole opening diameter and the arrangement number as variation parameters; according to a preferable scheme, the vortici