Research On The Dynamic Modeling And Simulation Of Heart And Its Simulative Device

Nowadays, heart diseases has increasingly become the main threat to human health and significantly affect human life quality. Therefore, the research on heart, one of the hottest topics in medical research and teaching area, receive extensive attention of the international researchers. In essence, heart is one muscle pump that maintain oxygen and blood circulation through lung and body and it is the power source of the whole blood circulation. The working mechanism of heart is similar with hydraulic pump, so it can be explained by using hydraulic system theory. This kind of explaination has more physical significance than pure physiology and medicine knowledge explaination and is also more straightforward than using electrical knowledge. Although the development of hydraulic system theory is fairly sound, apart from some conventional heart system modeling study in medical and electrical fields, there are no heart mechanism and characteristic research reports by using hydraulic system theory yet. Based on this background, the purpose of the research in this paper is to provid new references for medical auxiliary teaching and clinical teaching, also supply references for the heart and related field study.This paper presents a new heart modeling method. It takes heart as a simple hydraulic pump and the corresponding switch valves combination and establishes the whole human cardiovascular system model including heart- -systemic-pulmonary(HSP) and heart beat-to-beat intermittent pump blood process based on AMESim software platform. After the simulation of the new model, the results with significant physiological important information verify the feasibility of this new modeling method.Another task of this paper is to explore one method to establish heart dynamic modeling and calculate the flow field of the heart model. The Virtual Heart File of New York University is adopted to build the heart static model by using ICEM CFD as meshing tool. Then, the heart dynamic model is set up in Fluent software circumstance and analysed by simulation. With this method we obtain the ventricular movement rules of human heart during the cardiac cycle and realize the deformation ways of human heart by referring to human myocardial structure. In this part, the whole problem solving approach is finally built from the initial static model establishing to eventually flow field calculating process with each step operation experience. The heart CFD calculation validates the feasibility and correctness of this new modeling method.At last, one heart simulation experiment device has been designed including mechanical design, material object manufacture and control system building. It can be used to simulate blood flow with approximate effect of real heart system. This device is aim to simulate the pump blood mechanism of human heart and it is very intuitive and convenient to test and monitor the experiment process as the experimental parameters are adjustable widely with diverse adjustment forms.This research work in this paper provide new references for later heart research.