### Abstract

The pseudospectral method is a high-accuracy numerical modelling technique that requires less computer memory and computation time than the traditional techniques such as the finite-difference method. These advantages of the pseudospectral method have enabled us to practically apply this method to modelling realistic problems that have complex structure and source models. However, a major drawback of such numerical schemes for discrete grid models is that even for rather a simple structural model they require as much computational requirements (e.g. computation time and memory) as for an entirely complex structural model with the same size of the simple one. We actually need to employ idealised simple models, such as a model with geometrical symmetry, to investigate basic phenomena of seismic waves, to develop new techniques, or to choose optimal values of some computational parameters for more complex modelling. In this paper we propose an efficient approach of an economical pseudospectral method for calculation of wavefields in models symmetric with respect to a vertical plane or two orthogonal vertical planes. Using this approach, the wavefields only need to be computed in a half or quarter domain of the models, so that the computer memory and computation time can be reduced ideally by half or quarter, respectively, as compared with the calculation of the entire models.

Original language | English |
---|---|

Pages (from-to) | 73-79 |

Number of pages | 7 |

Journal | Earth, Planets and Space |

Volume | 51 |

Issue number | 2 |

Publication status | Published - 1999 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Earth and Planetary Sciences (miscellaneous)

### Cite this

*Earth, Planets and Space*,

*51*(2), 73-79.

**An efficient approach of the pseudospectral method for modelling of geometrically symmetric seismic wavefield.** / Takenaka, Hiroshi; Wang, Yanbin; Furumura, Takashi.

Research output: Contribution to journal › Article

*Earth, Planets and Space*, vol. 51, no. 2, pp. 73-79.

}

TY - JOUR

T1 - An efficient approach of the pseudospectral method for modelling of geometrically symmetric seismic wavefield

AU - Takenaka, Hiroshi

AU - Wang, Yanbin

AU - Furumura, Takashi

PY - 1999

Y1 - 1999

N2 - The pseudospectral method is a high-accuracy numerical modelling technique that requires less computer memory and computation time than the traditional techniques such as the finite-difference method. These advantages of the pseudospectral method have enabled us to practically apply this method to modelling realistic problems that have complex structure and source models. However, a major drawback of such numerical schemes for discrete grid models is that even for rather a simple structural model they require as much computational requirements (e.g. computation time and memory) as for an entirely complex structural model with the same size of the simple one. We actually need to employ idealised simple models, such as a model with geometrical symmetry, to investigate basic phenomena of seismic waves, to develop new techniques, or to choose optimal values of some computational parameters for more complex modelling. In this paper we propose an efficient approach of an economical pseudospectral method for calculation of wavefields in models symmetric with respect to a vertical plane or two orthogonal vertical planes. Using this approach, the wavefields only need to be computed in a half or quarter domain of the models, so that the computer memory and computation time can be reduced ideally by half or quarter, respectively, as compared with the calculation of the entire models.

AB - The pseudospectral method is a high-accuracy numerical modelling technique that requires less computer memory and computation time than the traditional techniques such as the finite-difference method. These advantages of the pseudospectral method have enabled us to practically apply this method to modelling realistic problems that have complex structure and source models. However, a major drawback of such numerical schemes for discrete grid models is that even for rather a simple structural model they require as much computational requirements (e.g. computation time and memory) as for an entirely complex structural model with the same size of the simple one. We actually need to employ idealised simple models, such as a model with geometrical symmetry, to investigate basic phenomena of seismic waves, to develop new techniques, or to choose optimal values of some computational parameters for more complex modelling. In this paper we propose an efficient approach of an economical pseudospectral method for calculation of wavefields in models symmetric with respect to a vertical plane or two orthogonal vertical planes. Using this approach, the wavefields only need to be computed in a half or quarter domain of the models, so that the computer memory and computation time can be reduced ideally by half or quarter, respectively, as compared with the calculation of the entire models.

UR - http://www.scopus.com/inward/record.url?scp=0033061096&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033061096&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0033061096

VL - 51

SP - 73

EP - 79

JO - Earth, Planets and Space

JF - Earth, Planets and Space

SN - 1880-5981

IS - 2

ER -