MATEC Web of Conferences
Volume 42, 20162015 The 3rd International Conference on Control, Mechatronics and Automation (ICCMA 2015)
|Number of page(s)||5|
|Section||Applications of Computer and IT|
|Published online||17 February 2016|
A High Precision Direct Integration Scheme Based on Variational Principle and Its Applications
1 Shanghai Jiao Tong University, School of Mechanical Engineering, 200240 Shanghai, China
2 Shanghai Jiao Tong University, Department of Mathematics, 200240 Shanghai, China
3 Shanghai Second Polytechnic University, Department of Mathematics, 201209 Shanghai, China
Dynamics response of systems to impact or loading may be effectively treated by direct integration. However, it is often difficult to select the time-step of integration properly, especially in the case which the system is badly stiff. High Precision Direct integration based on variational principle is given (HPD-VP) for homogeneous systems and HHPD-VP method for the nonhomogeneous systems are given. This method not only takes the advantage of variational principle formula, which is much precise and is stiff A-stable, but also can avoid the truncation error of the computer. For the large systems, especially, the systems with different frequency or the stiff systems, our methods are stable, accurate and efficient. Numerical experiments show the convergence order of the scheme derived from the variational principle, and is much precise and is effective in engineering.
© Owned by the authors, published by EDP Sciences, 2016
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