Method for calculating vehicle body A column obstacle angle

The invention relates to a method for calculating a vehicle body A column obstacle angle, and belongs to the field of vehicle body design of automobiles. The method includes: firstly determining a driver head key point Pm, rotating a plane upward and downward to acquire a plane P1 and a plane P2; acquiring an intersection point according to the plane P1 and a spatial linear equation of an upper fixing point and a lower fixing point of an A column, using a z coordinate of the intersection point as an equation of a horizontal cross section S1; acquiring a linear equation of a random point C of an upper and lower fixing point cross section and a corresponding point C' according to the spatial linear equation of the upper fixing point and the lower fixing point of the A column, calculating an intersection point D1 between the A column and the horizontal cross section S1 through simultaneous solution of the CC' linear equation and the horizontal cross section S1, and projecting the point to a horizontal plane P0 to acquire a projection point D1'; approximatively determining an inner tangent point a and an outer tangent point b, determining coordinates of a left eye point E1 and a right eye point E2 of a driver according to a geometrical relationship formed by an inner tangent line and an outer tangent line, and calculating an included angle alpha as a dual eye obstacle angle of a vehicle body A column. The method is suitable for all the passenger vehicles, can provide a new method for design of enterprise vehicle body A columns, can shorten the design cycle of A column cross sections, and can accelerate the design process.