Biomechanical research for running motion based on dynamic analysis of human multi-rigid body model

The rapid development of economy has gained the attention of people towards physical health singing various physical exercise activities. These physical activities may lead to the joint damage which is studied in this part of the research. In order to study the causes of joint damage, biomechanical research is carried out for the human running process, and the internal law of running and the force characteristics of limb joints are analyzed through experimental research. This article is mainly based on the research based on the motion parameters measured by the treadmill at a speed of 8 km/h, establishing kinematics and dynamics models, and analyzing the motion characteristics of the human hip joint at different speeds. The data is filtered to obtain changes in running joint rotation angle and limb acceleration. The multirigid body model is combined and simmechanics is utilized for simulation. The experimental results show that the experimental curve at a speed of 8 km/h has similarities and differences with the simulation curve. The value of the simulation curve is slightly larger than that of the experimental curve, and the simulation curve has a smoother trajectory. This analysis proves the mathematical model of the human joint rotation angle and its correctness to simulate human movement.