主要期刊论文

作者: L.-X. Li, et al |

发表/完成日期: 2003-10-15 |

期刊名称: Journal of Sound and Vibration |

期卷: 261(2003) |

相关文章: 16(2003JSV).pdf |

论文简介 |

The infinite element approach is effective in solving unbounded wave problems. It models the
unbounded region in its entirety by using elements of infinite extent, and the non-radiation condition is therefore readily accommodated. In the past 20 years, a number of infinite element schemes have appeared, which can roughly fall into mapped element and unmapped element. In unmapped infinite element [1,2], the shape functions are directly constructed within physical element. Although the convergence and accuracy of this kind of elements are assured by interpolation functions, they often involve complex integration procedures in forming the system matrices because of the infiniteness of real elements. In mapped infinite element [3–10], a geometry mapping is first introduced, and the field variable is then interpolated within the parent element. In particular, the mapped wave envelope infinite element enables all the system matrices to be evaluated by using the standard Gauss quadrature. Another advantage of this envelope element is that the system matrices can be separated in terms of the power of frequency and therefore can be easily used to solve transient problems, although the symmetricnature is not preserved in them, which is the only drawback of this element. |