Tread optimization design method for wheels of tramcar

The invention provides an optimization design method for a tramcar wheel tread. The method can effectively solve the problem that the adaptability is poor when an original wheel tread of an export tramcar is matched with various steel rail profiles. The profile of the rim of the optimized wheel tread basically coincides with the original wheel tread, the equivalent taper of the wheel tread is increased, the trafficability of a small-radius curve of the wheel tread is improved, and the profile from the throat area of the rim of the original wheel tread to the outer end of the tread is optimized into seven arcs and two straight lines from one arc and two straight lines; the wheel flange width of a wheel tread is optimized to be 20.8 mm, the wheel flange thickness is 19.3 mm, the arc radius and the bottom height of the throat root position of the wheel flange are increased, the wheel-rail contact area is increased, and the contact stress of the throat root position of the wheel flange is improved; the height of