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| A time step’s automatic adjustment method with load synchronous variation |
| LI Bin1 TANG Xiao-wei1 |
| 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology,Dalian 116024, China |
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Abstract To improve the numerical calculation efficiency, aiming at errors caused by time step in structural dynamic time history analysis, a relationship between time step and relative error was proposed to realize the time step automatic adjustment, satisfy target error limits, and enrich the time adaptive theory. The effectiveness of this method was validated through comparing the calculating result with the analytical solution to an example. It was shown that in local area, the faster the change of external load, the smaller the corresponding adaptive time step; the method can effectively solve problems of calculation being divergent or interrupted due to improper setting of time step in numerical dynamic computations under impact load, vibration load, explosion load or seismic load.
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Received: 11 August 2017
Published: 28 May 2018
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