Diving Body Shape Coefficient Setting Based on Moment of Inertia Analysis

Abstract

In the diving competition rules, FINA specifies the code of different diving movements and its difficulty coefficient. The rule simply relies on the complexity of the action to determine the difficulty. In the formulation of the diving difficulty coefficient, the athlete's body shape has not been fully considered, so it is difficult to fully guarantee the fairness of the diving competition. Based on the above problems, this paper analyzes the rules of the FINA's 10-meter platform diving difficulty coefficient, establishes the multi-rigid-body model of the human body, obtains the relationship between the moment of inertia and the completion time of the athletes to complete each diving action and the athlete's body shape, and determines the index to measure the athlete's body shape. The Lagrange Interpolation Polynomial is used to establish the functional relationship between the body shape correction coefficient and the body shape correction index, and the body shape correction coefficient corresponding to different body type athletes is determined accordingly. Finally, a new 10-meter platform diving difficulty coefficient scheme was developed.