摘要
研究了一种通过Sommerfeld辐射条件建立的吸收边界条件,并由此引入吸收边界算子,结合有限元数值方法,模拟了无限区域非均匀介质中的近场散射问题,对误差的主要来源也作了一些分析。这种吸收边界条件具有解耦特性,简化了计算,且近似程度较高,数值计算结果与解析结果的比较表明了良好的吸收效果。另外有限元方法的应用。
An approximation method for Sommerfeld radiation condition is discussed and the absorbing boundary operator is applied. Combined with the finite element method, the scattering in inhomogeneous elastic background media is simulated and the error is analyzed. With the method proposed, the simulation is simplified and the accuracy of the absorbing boundary condition is increased. By comparison with the analytical solutions the numerical results demonstrate the efficiency of the method. Because of joint application with finite element method it can be used in simulating the scattering from special geometrical shape body or from multi scatters.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第6期48-50,60,共4页
Journal of Vibration and Shock
关键词
吸收边界条件
散射波
有限元
误差分析
Boundary conditions
Computer simulation
Error analysis
Finite element method
Wave propagation
