ABAQUS中如何添加非反射边界条件

非反射边界条件需要同时设置damping和spring，根据你的模型要求，设置的参数和模式都不一样。你得多介绍一下你的要求，参考一下如下手册上的内容。看是否是你所需要的。

具体的在手册的如下章节。看看以后，你可能会有所启发。

6.3.4 DIRECT-SOLUTION STEADY-STATE DYNAMIC ANALYSIS

Damping

If damping is absent, the response of a structure will be unbounded if the forcing frequency is equal to an eigenfrequency of the structure. To get quantitatively accurate results, especially near natural frequencies, accurate specification of damping properties is essential. The various damping options available are discussed in “Material damping,” Section 25.1.1.
In direct-solution steady-state dynamics damping can be created by the following:
• dashpots (see “Dashpots,” Section 31.2.1),
• “Rayleigh” damping associated with materials and elements (see “Material damping,”
Section 25.1.1),
• damping associated with acoustic elements (see “Acoustic medium,” Section 25.3.1; “Infinite
elements,” Section 27.3.1; and “Acoustic and shock loads,” Section 32.4.6),
• structural damping (see “Damping in dynamic analysis” in “Dynamic analysis procedures:
overview,” Section 6.3.1), and
• viscoelasticity included in the material definitions (see “Frequency domain viscoelasticity,”
Section 21.7.2).
When a real-only system matrix is factored, all forms of damping are ignored, including quiet
boundaries on infinite elements and nonreflecting boundaries on acoustic elements.