针对采用有限元法计算声学问题时，数值离散误差会随计算频率的增加而增加的问题，通过光滑技术对计算域进行重新划分，重新装配总刚度矩阵，适当软化有限元模型刚度，从而有效降低数值离散误差，得到更精确的计算结果。%Aiming at the problems of the numerical dispersion error increases with the computing frequency in acoustic solu -tion by FEM, the edge-based smoothed finite element method (ES-FEM) was used, by which the computing domain was rebuilt and the global stiffness matrix was reassembled , so as to soften the FEM stiffness , reduce effectively the numerical dispersion er-ror to obtain more accurate result .
展开▼
