Evaluation Parameters dialog box

Setting
Integration Method	Specifies the numerical integration method to use for solving the differential equations in transient analysis events.Duhamel's Integral Newmark-Beta
Hypermatrix Buffer Size	Controls the size of the memory buffer allocated for the matrix data used in Response Dynamics calculations.0 — Memory buffer is set to 4-mega integer words.n (where n is an integer greater than 0) — Memory buffer is set to n-mega integer words.Note: In most cases, you should leave this option set to the default value. If you set it too small, you may encounter hypermatrix operation errors. If hypermatrix operation errors occur and you have not changed the default Hypermatrix Buffer Size, contact Customer Support.If your model is very large, has a large number of modes, or has a large number of evaluation steps (frequency or time), increasing the Hypermatrix Buffer Size may reduce the processing time and help prevent some memory issues.The term hypermatrix refers to an internal file the software uses to store data in matrix form so internal functions can operate on them. The matrices are in a hypermatrix file and the processing retrieves the matrix data as needed. All of the information to perform an evaluation is stored in the hypermatrix.
Evaluations Maximum Array Size	The dynamic storage array size allocated for Response Dynamics evaluations. Set this option to a value greater than or equal to 1000000.Note: If your model is very large, has a large number of modes, or has a large number of evaluation steps (time or frequency), increasing the Evaluations Maximum Array Size may help prevent problems due to insufficient evaluation memory.
Use Minimum Damping Ratio	Determines the minimum damping ratio when damping is not already defined in the event. When this option is selected, the default damping value is 0.001 percent. When this option is not selected, the default damping value is zero.
Correct to Zero Mean	Controls the time-domain integration of acceleration excitations. The software uses this option in evaluating time responses to acceleration loads. When this option is selected, the software corrects for rigid drift by assuming a zero mean. Rigid drift is filtered out based on a numerical integration that does not assume an initial condition.This process takes the FFT of the acceleration input function, zeroes out the 0 Hz component, and then converts back to time domain with FFT. This process is done twice for velocity and acceleration. It removes only the rigid-body translation. It does not remove the low-frequency components. When this option is not selected, the software does not perform any correction, and rigid drift shows in the displacement response when an acceleration excitation is applied. Note: Generally, you should select this option when using an acceleration excitation.

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Evaluation Parameters dialog box, Simcenter 3D 2021.1 Series

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