Damaged cable identification method used in case of angular displacement of support and temperature variation on basis of space coordinate monitoring

The invention relates to a damaged cable identification method used in case of the angular displacement of a support and the temperature variation on the basis of the space coordinate monitoring. According to the damaged cable identification method, on the basis of the space coordinate monitoring, the angular displacement of the support, the temperatures of cable structures and the environment temperature are monitored to determine whether a mechanical calculation reference model of the cable structures needs to be updated, so as to obtain a mechanical calculation reference model of the cable structures, in which the angular displacement of the support, the temperatures of the cable structure and the environment temperature are counted; on the basis of the new model, a change matrix of a unit damage monitored quantity is obtained by calculation; and according to an approximate linear relation between a current value vector of the monitored quantity and a current initial value vector of the monitored quantity, the change matrix of the unit damage monitored quantity, a unit damage scalar and a current nominal damage vector to be obtained of a cable system, a noninferior solution of the current nominal damage vector of the cable system is calculated, so that when the support has the displacement and the temperature is changed, the positions and the damage degrees of damaged cables can be accurately determined.