Lamber's consine relatino

By using the cosine relation of angle between the skew and straight beam bridges, the approximate method for solution of surplus unknow forces of continuoud skew beam bridge is obtained.

应用斜梁桥与正梁桥之间夹角的余弦关系 ,找到了一种求解连续斜梁桥赘余未知力的近似方法。