Abstract: Various numerical methods including mainly the finite element methods with two--nodestraight-line and polynode curved cable element have been presented to analyze the nonlinearity ofthe tension structures which airs playing a great role in structures. As far as the polynode curvedelement methods are concerned, the precision of which is well but its freedoms are higher, andthe coordinates of inner nodes in the element is usually difficult to determine. The straight-lineelement model leads to bad precision, r...