1.10.5 Acoustic-acoustic tie constraint in two dimensions

Products: ABAQUS/Standard  ABAQUS/Explicit  

This example is intended to illustrate and verify the use of the tie constraint (*TIE) in a simple acoustic system, using several procedures.

Problem description

Loading

For the *STEADY STATE DYNAMICS simulations both meshes are excited by applying a uniform volumetric acceleration using *CLOAD options on degree of freedom 8 to the nodes on the left edges of the models. Consistent nodal loads are applied.

For the transient dynamic problems the same *CLOAD distribution is applied to the same edges but with a sinusoidal amplitude, specified using the *AMPLITUDE option.

In all instances a plane wave absorbing condition is imposed on the rightmost edges of the *TIE constraint and reference domains using the *IMPEDANCE option.

Results and discussion

Input files

Figures

Figure 1.10.5–1 Mesh configuration.

Figure 1.10.5–2 Pressure phase at 180.6 Hz, using *STEADY STATE DYNAMICS, DIRECT.

Figure 1.10.5–3 Pressure magnitude at 0.012 seconds, using *DYNAMIC.

Figure 1.10.5–4 Pressure magnitude at 0.012 seconds, using *DYNAMIC, EXPLICIT.