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평면 다물체 동역학 해석에서 GPU 병렬 프로그래밍의 계산효과
전철웅(C. W. Jun),손정현(J. H. Sohn) 한국동력기계공학회 2012 동력시스템공학회지 Vol.16 No.4
In this paper, the equations of motions for planar multibody dynamics are established for considering the parallel programming based on GPU. Cartesian coordinates are used to formulate the equations of motion and implicit integration method called HHT-alpha is employed. Open chain multibody system is considered for computer simulation. CUDA toolkit is employed for establishing the GPU parallel programming. The exactness of the analysis is verified from the comparison with ADAMS. The results from parallel computing based on GPU are compared with the results from the sequential programming based on CPU in terms of calculation time. The multiple pendulum with bodies and joints is employed for the computer simulation. In the pendulum system that has 290 bodies, the parallel program indicates an improved efficiency of about 25.5 second(15.5% improvement). It is noted that the larger the size of system is, the time efficiency is better.
주윤하(Y. H. Joo),전철웅(C. W. Jun),이다혜(D. H. Lee),한효주(H. J. Han),안진효(J. H. An),이종민(J. M. Lee),박철우(C. W. Park) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
In the present study, we performed design processes of reciprocating pump to make pulsatile flow for simulation of aortic blood flow in arteries. To design a pulsatile pump, we firstly calculated the pressure for working fluid in a cylinder accurately based on fundamentals of fluid mechanics. According to the pressure expectation, every compartments, such as piston, crank shaft and gear, were designed to overcome plastic deformation. As a result, we evaluated the power requirement effectively for a reciprocating pump motor selection.