A Nonlinear Multibody System Dynamics Model to Predict the Impact Response of Human Chest during Cardiopulmonary Resuscitations

摘要

Research on understanding of the behavior of human thorax during CPR are done by many authors including Ref. [1-3]. In all previous work a single degree of freedom with a nonlinear spring and a point mass is used to model the biological system. In the present work we propose a two degrees of freedom model with a nonsymmetric shape based on von Mises trass model, von Mises trass [4-6] is a touchstone for various approaches to the study of more complex thin-walled structures, which played an important role in the theory of stability of elastic and viscoelastic structures [7]. After driving the equation of motion of the mechanical model, numerical result showing the equilibrium paths and singularities of load deflections are will be presented.