Repozytorium publikacji - Politechnika Gdańska

Considering a striated skeletal muscle as a different properties mechanical system, one can understand series of important phenomena happening in a real muscle phenomenon of muscle: 1) force delivery to skeletal apparatus through tendons; 2) changing of exerted muscle belly mass distribution with regards to skeletal apparatus; 3) beginning drop of muscle force. A disregard of first phenomenon causes an impossibility to explain why different forces are occurring in the distal tendon and the proximal tendon. Considering the second phenomenon, one can estimate influence of muscles' bellies inertial forces on rotation dynamics of limb examined. An existence of third phenomenon can be explained by modeling a muscle as a rigid-flexible system consisted of different mechanical properties fragments. Numerical results of three mechanical models of muscle behavior are presented in this paper. Each mechanical model has eighteen forms. Each form has two mathematical formulation: the differential equations system and the integro-differential equation. This method of modeling allows to consider muscles with tendons (stiff systems) or muscles without tendons (non-stiff systems). The behavior of fifty four forms were examined using a complex concentric-excentric-isokinetic exertion. Analyzing numerical results, one can conclude in what cases respective mechanical model might be used.

Autorzy

• dr hab. inż. Wiktoria Wojnicz link otwiera się w nowej karcie ,
• prof. dr hab. inż. Edmund Wittbrodt link otwiera się w nowej karcie