Reply To: How to perform time history analysis?

[aboa2000]

I attempted the acoustic analysis option but got the following results. 

Along with the following messages:

One or more Contact Regions have Contact Shell Face or Target Shell Face set to Program Controlled. This can adversely affect performance when writing the input file. Consider displaying element normals and selecting either Top or Bottom shell face.

One or more Contact Regions are connected to Acoustic Physics Regions. To improve the solution, the contact settings may have been overwritten internally.  Refer to the notes for Acoustics Analysis in the Help System for more details.