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A platform for research: civil engineering, architecture and urbanism
Road curve having easement curve, and forming method thereof
A method for forming an easement curve for road curve. The easement curve is used for connecting a transition curve segment DE between a circular curve segment CD with a curvature of 1/R and a straight line segment EF with a curvature of 0. The method comprises: establishing a rectangular coordinate system with an origin of coordinates being at a center of the circular curve CD; in the rectangular coordinate system, enabling the curve segment DE to satisfy (I), n being an integer with a minimum value of 5, ai=fi(H, L, a, R, K), f(x) satisfying that C and D at least have continuous second derivative. The road curve formed by using this method can implement continuous transition of a curvature between the straight line and the circular curve and a curvature change rate.
Road curve having easement curve, and forming method thereof
A method for forming an easement curve for road curve. The easement curve is used for connecting a transition curve segment DE between a circular curve segment CD with a curvature of 1/R and a straight line segment EF with a curvature of 0. The method comprises: establishing a rectangular coordinate system with an origin of coordinates being at a center of the circular curve CD; in the rectangular coordinate system, enabling the curve segment DE to satisfy (I), n being an integer with a minimum value of 5, ai=fi(H, L, a, R, K), f(x) satisfying that C and D at least have continuous second derivative. The road curve formed by using this method can implement continuous transition of a curvature between the straight line and the circular curve and a curvature change rate.
Road curve having easement curve, and forming method thereof
XU YINZHE (author) / XU RONGJUN (author)
2015-04-22
Patent
Electronic Resource
English
IPC:
E01C
Bau von Straßen, Sportplätzen oder dgl., Decken dafür
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