[1]TANG Hui,LI Xiaojun.Analysis on Measures of Eliminating Drift instability of Multi-transmission Formula in Solving Scattering Problems[J].Journal of Seismological Research,2019,42(04):493-502.
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Analysis on Measures of Eliminating Drift instability of Multi-transmission Formula in Solving Scattering Problems
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
42
Number of periods:
2019 04
Page number:
493-502
Column:
Public date:
2019-12-15
- Title:
- Analysis on Measures of Eliminating Drift instability of Multi-transmission Formula in Solving Scattering Problems
- CLC:
- P315.9
- DOI:
- -
- Abstract:
- :For solving the wave scattering problems with Multi-Transmitting Formula,the effects of the real-time order reduction method,the modified operator method,the adding visco-elastic elements method and the improved wave input method on eliminating drift instability and on computation accuracy are compared and analyzed to provide useful reference for engineering application of this artificial boundary.The results show these four methods can effectively eliminate the relatively slow drift instability phenomenon; when the instability trend is strong,the modified operator method and the adding visco-elastic elements method cannot depress the instability effectively.The low-frequency errors may be introduced by the real-time order reduction method when the damping is small.Under the premise that the values of parameters can be determined appropriately,the modified operator method and the adding visco-elastic elements method can improve the calculation accuracy of low-frequency.The improved wave input method can depress drift instability and improve calculation accuracy without setting parameters artificially.
- References:
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Last Update:
2019-12-15