An Singular Element Subdivision Method Related to Time-Step Length
[1]Lee Yuan,Zhang Jianming,Zhong Yudong,et al.An Singular Element Subdivision Method Related to Time-Step Length[J].Journal of Zhengzhou University (Engineering Science),2019,40(01):7-11.[doi:10.13705/j.issn.1671-6833.2018.04.010]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
40
Number of periods:
2019 01
Page number:
7-11
Column:
Public date:
2019-01-10
- Title:
- An Singular Element Subdivision Method Related to Time-Step Length
- Keywords:
- time domain boundary element method; elastic dynamics; singular integral; unit subdivision; volatility front
- CLC:
- -
- Abstract:
- The singular integral was one of the difficult problems for the Boundary Element Method to solve the physical problems. Its precision had great influence on the accuracy of the calculation result. Element subdivision was the key to solve the singular integral. Aiming at the problem of dynamic analysis. An element subdivision method related to time-step length was proposed. Compared with the traditional method, this method not only considerd the position of the source point in the cell, but also the position of the wave front, which could reflect the segmentation characteristic of the kernel function. Therefore it could more accurately simulate the impact of longitudinal wave and shear wave on the integral of the element. In this paper, the accuracy of the method and its effect on the calculation accuracy were verified by two examples. The results showed that the error was 15.5% less than that of the traditional method for the first analysis step with singularity.
- References:
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- Similar References:
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Last Update:
2019-02-28