Hollow modeling method of reinforced frame structure with truss-type inner cavity

Abstract

The invention provides a hollow modeling method of a reinforced frame structure with a truss-type inner cavity. A hollow stiffener is finally obtained by configuring a stiffener appearance entity 3D model and a stiffener inner cavity entity 3D model, and performing the Boolean operation and the Boolean difference operation. The method is small in calculation error, simple in calculation, and capable of ensuring the smooth transition from the appearance cross section of a stiffener to the cross section of an inner cavity and the smooth transition from two ends of a front edge and a tail edge to a stiffener truss.

Description

technical field [0001] The invention relates to a modeling method, in particular to a hollow modeling method with a truss-type inner cavity reinforcing rib structure. Background technique [0002] At present, the existing design method is to use the B-spline curve method to divide the cross-section line of the rib into n sections according to the number of half-waves, and calculate the welding section of each rib in each curve according to the welding parameters. The start and end position parameters of each welding segment are connected using B-splines to obtain the centerline of the stiffener truss, and then the centerline of the stiffener truss is segmented according to the start and end positions of each welding segment, and the segments are respectively Make equidistant offset lines on both sides of the rib section line, use a straight line to connect the corresponding end points of the two offset lines, and use a straight line to connect the starting point and key poin...

AI Technical Summary

Problems solved by technology

[0002] At present, the existing design method is to use the B-spline curve method to divide the cross-section line of the rib into n sections according to the number of half-waves, and calculate the welding section of each rib in each curve according to the welding parameters. The start and end position parameters of each welding segment are connected using B-splines to obtain the centerline of the stiffener truss, and then the centerline of the stiffener truss is segmented according to the start and end positions of each welding segment, and the segments are respectively Make equidistant offset lines on both sides of the rib section line, use a straight line to connect the corresponding end points of the two offset lines, and use a straight line to connect the starting point and key point in the two adjacent peak segments to generate a section line; this method has limitations However, the welding position and shape of the stiffener truss cannot be accurately obtained by using B-spline curves and B-spline equidistant curves, and the calculation is complicated and cumbersome. Smooth transition from end to stiffener truss