| Marathon running is track and field sports in the long distance running, is the need for stamina and technique of a sport.Running process is a dynamic continuous process, namely the ground from the sole of his foot, buffer to stretching in phase suspension process of muscle contraction and diastole continuously drive the human body each joint movement, muscle contraction and relaxation for a long time can cause muscle fatigue.Because of the long distance movement muscle damage phenomenon very much, but the current domestic study of long distance of lower limb skeletal muscle system is relatively blank, no protective products for muscle fatigue, study of human movement state protection will become a research trend of sports protective.This paper is to research and development run quantitatively protection movement state of lower limb muscle fatigue trousers as research target, using the finite element software to carry on the simulation, the quantitative protection for long distance movement parameters, and making of human lower limb skeletal muscle system has a quantitative protection protective pants and verified.1.Long distance movement of lower limb skeletal muscle fatigue analysis Combined with long distance movement along the easy out of the first of the status quo of muscle fatigue, muscle system combined with the perspective of human anatomy and biomechanics, the human lower limb muscles in the running of tetanic contraction and generate fusion phenomenon is analyzed, and further analyzes the lower limb skeletal muscle causes of fatigue in the running.2.Run cases lower limb muscle fatigue and protection model Using Mimics the basis of human lower limb muscle model is set up;By the magic of triangle surface model of treatment for lower limb muscle, repass Hyperworks generated virtual model, to obtain the static human lower limb skeletal muscle system. Through dynamic capture system and 3 d measuring forces combined with dynamic correlation formula and body mass ratio, calculated the tibia, femur, and the ground reaction force.Through the calculation of muscle force optimization model in a gait cycle of muscle force.By ABAQUS on the surface of the musculoskeletal system applying certain load as force of bones and muscles, while in the muscle surface on different load as the load of protection, in the finite element software static stress analysis of the lower limb skeletal muscle system, finally obtained the gait cycle model of human upper extremity muscle system, and then calculate the parts are prone to muscle fatigue.Through the methods of electrical diagram, obtain electromyographic signal, according to the time domain and frequency domain analysis to determine the muscle fatigue, get the number of the gait cycle fatigue state, ABAQUS is used to establish the upper extremity muscle fatigue model, and the effect of different quantitative protection model is set up.3.The long distance of protective clothing development and validationWith every muscle force after fusion phenomenon, repeat cycle effect on lower limb skeletal muscle system, at the same time in the lower limb muscles exert protective load, simulate human lower limb muscles in different muscle protection under the action of sweatpants, muscle of local stress and fatigue life.The resulting protective parameters could be used to make protective sports pants fabric choice.Finally will have a quantitative protective effect of the protective parameters used in product development, production has a quantitative protective effect of protective sports pants.And then through the methods of electric equipment for presence of protective signal comparison verification, and further optimize the distance protection pants design.This paper builds a set of including anatomy, biomechanics, electromyography technology, computer simulation technology as well as the protection of the development of sportswear research system, is practical, and the study of other sports protective clothing also has a certain guiding significance. |
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