METHOD FOR ESTABLISHING TOWER BODY DAMAGE STATE FEATURE POINT MAPPING MODEL OF TOWER CRANE AND METHOD FOR QUICKLY DETERMINING DAMAGE

A method for establishing a tower body damage state feature point mapping model of a tower crane and a method for quickly determining damage, comprising: constructing a tower crane structure in a combined state of different damage positions of a tower body, and acquiring a spatial position data set of the top end of the tower body when a rotating arm of the tower crane in each damage state rotates for one lap under the working condition of a constant load; performing N times of sum function fitting on spatial position data, and extracting feature vector sets such as an amplitude, a frequency, and a phase of a sine function obtained by fitting; and constructing a feature plane set by taking the feature vector sets of the first three functions of a sine function having the minimum fitting error in an x-axis direction and a y-axis direction in each damage state as vertexes of a triangle, taking a feature plane in a perfect state as a reference plane to calculate an included angle between the other plane and the