Characterization of the deformation properties of a ball game racket string pattern

A method for characterizing a string pattern of a ball game racket frame which is strung in a string bed plane and comprises a racket head with an inner contour facing the string pattern, wherein the string pattern comprises intersecting main strings and cross strings forming a plurality of points of intersection, said method comprising the steps of:

• (a) modeling the string pattern using the geometry of the intersecting strings and the inner contour of the racket head;
• (b) applying a defined preload to the modeled string pattern;
• (c) determining at least one physical quantity describing the local deformation of the string pattern at at least three points of the string pattern in response to a defined force acting on the respective point of the string pattern;
• (d) deriving at least one local property of the string pattern at the at least three points from the at least one physical quantity and the defined force;
• (e) classifying the at least three points of the string pattern using the physical quantity or quantities respectively determined there and/or using the property or properties derived for said points;
• and
• (f) representing the string pattern by specifying the class of the at least three points of the string pattern.