Passenger car B column variable thickness optimization method based on crashworthiness

The invention discloses a passenger car B column variable thickness optimization method based on crashworthiness. The method comprises the steps of building a side face initial collision model and a side face collision evaluation criterion of a test vehicle, carrying out topological optimization on the collision resistance of a B column of the test vehicle, defining a B column variable thickness optimization variable, carrying out B column variable thickness test design, building a B column variable thickness proxy model and carrying out precision evaluation, building a passenger vehicle B column variable thickness optimization model considering the collision resistance and the like. Thickness distribution and selection of the B-column structure are designed, the lightweight potential of the B-column structure of a vehicle body is excavated to a greater extent, the B-column of the passenger vehicle is segmented to determine thickness parameter setting, thickness parameter design is carried out on each segment