15.2.1. Calculation
The user can set parameter and compute the ERP.
Radiation Loss Factor (RLF): The default is 1.0.
Sound Velocity (C): The default is 340,000 mm/s.
Air Density (RHO): The default is 1.293e-9 kg/mm^3.
Sampling Frequency: The default is 100 Hz. The Sampling Frequency is used for the scope data. If the Sampling Frequency is used 1000 Hz, then the sampling time is set with 1.0/1000=0.001 s. Therefore, the computed time interval is defined as the 0.001s for the scope data.
Patch Set: Selects some patch sets any flexible (FFlex and/or RFlex) bodies.
Add/Remove: Adds and removes some patch sets.
Add Row: Adds a row for adding a patch set.
Delete Row: Deletes a row for remove a patch set.
Modal ERP: Accesses the Mode Selection dialog box as shown in the below figure. If the selected Patch Set belongs to the RFlex, the user can select modes to calculate a Modal ERP. The selected modes applies equally to all Patch Sets that belong to the same RFlex body
Simulation Time: Selects number of animation frames.
Start Frame and End Frame: Sets start animation frame and end animation frame with a slider control.
Time: Shows simulation time each selected the Start Frame and End Frame.
Frame: Sets frame number. (A natural number is available.)
Output Files Options : Accesses the Output Files dialog box as shown in the below figure. The user can select data precision of *.ARD file and *.AMMX file(Single/Double). And the user can use option to delete *.ERP file after making output files.
Base Directory: Shows the base directory which has animation data and target directory for generating results files. Acoustics toolkit generates following files.
ACS file: has scope data (raw data).
ERP file: has ERP data (raw data).
ARD file: has a ERP contour data on a flexible body.
AMMX file: has a Min. and Max. ERP data for contour on a flexible body.
The Acoustics result files should exist on the base direction.
Base Name: Sets result name. The Base Name is a model name.
Import: If previous calculated Acoustics result exists, then the Acoustics Result List dialog shows available list. The user selects a previous calculated Acoustics result. Note that the user should have previously selected the Patch-Set used at the time of the calculation of the selected result.
Making Output Files: Calculates *.ARD and *.AMMX Files by using *.ERP File.
Calculation: Calculates Acoustics results. And the calculated result is imported. If the base name exists in the base directory, then the results are changed with latest parameters.