Prestress valuing method suitable for large-span flexible photovoltaic support cable

The invention discloses a cable prestress valuing method suitable for a large-span flexible photovoltaic support, and the method comprises the steps: building a rigid body pressure measurement model of the large-span flexible photovoltaic support according to the actual condition of a project, carrying out a wind tunnel test, and obtaining the photovoltaic surface wind pressure distribution data of a photovoltaic support system; an ANSYS finite element large-span flexible photovoltaic support array structure model is established; by changing prestress combinations of the inhaul cables, structural dynamic characteristics, structural displacement and internal force response characteristics under different prestress combinations are obtained; and in combination with structural dynamic characteristics, structural displacement and internal force response characteristics under different prestress combinations, based on a finite element simulation model and a nonlinear least square method principle, obtaining a pres