9496

8778

كارشناسي ارشد

مكانيك- طراحي كاربردي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1393

پانزده،126ص.: مصور،نمودار

ص.ع.به فارسي و انگليسي

محمدجعفر صديق

محمدتقي كريمي

5/11/93

مهدي كشميري، حسن موسوي

مهندسي مكانيك

ID8778

Inverse Dynamics and Impact Effects on the Hip Joint Forces of Perthes Subject Walking with Scottish Rite Orthosis Marzieh Mojaddarasil m mojaddarasil@me iut ac ir Date of Submission 2014 09 17 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Mohammad Jafar Sadigh jafars@cc iut ac irAbstract In this thesis we study human joint forces and especially the hip joint force in order to understand thecause of hip joint deformation in Perthes disease In this regard first a three dimensional dynamic modelwith 7 links and 18 degrees of freedom is proposed to obtain the human joint forces and the ground reactionforce while walking In the double support phase of walking in which both feet are on the ground we arefaced with an undetermined problem Thus in order to develop a dynamic model which appropriatelyresembles the actual walking inspired by experimental results we consider extra assumptions for thedistribution of the force between the two feet in the double support phase Within the framework of theseassumptions inverse dynamics is solved to obtain the joint forces and specifically the hip joint force inboth single and double support phases The validity of the proposed theoretical model which isindependent of experimental data is then verified through some experiments Then a parametric study iscarried out to see the effects of changing the parameters of the orthosis on the hip joint force avoiding thetime and cost requirements of producing different orthoses and carrying out clinical tests In particular weinvestigate how and to what extent the orthosis reduces the hip joint force by keeping the two legs far fromeach other Moreover since it seems that the main reason of hip joint deformation in Perthes disease is the impactapplied to the hip joint we further study the hip joint impact forces while walking and jumping In this vein by developing dynamic models we see how some parameters can affect these impulsive forces Inparticular we look into four parameters the elasticity of the shoe the leg configuration before impact thestiffness of the joint and the angle between the two legs Keywords Perthes disease Hip joint Scottish rite orthosis Inverse dynamics Single and doublesupport phases Impact dynamics Shoe elasticity Leg configuration before impact Jointstiffness

محمدجعفر صديق

محمدتقي كريمي

مهدي كشميري، حسن موسوي