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Patran Reference Manual
Random Analysis
11.1 Introduction
Purpose
Features of MSC Random
Advantage over Utility version of MSC Random
Architecture of MSC Random
Limitations
11.2 Basic Random Analysis Theory
Introduction
Theory
Cross-Power Spectral Density and Cross-Correlation Functions
Cumulative Root Mean Square (CRMS)
Coherence Function or Schwarz's Inequality
Numerical Integration Using Log-Log Approximation
Von Mises Stress in Random Analysis
11.3 Random Analysis Process
Process Overview
Frequency Response Analysis Cycle
Frequency Response Analysis Setup
Random Analysis Cycle
11.4 Using MSC Random
Output Files:
11.5 Example 1: Cylinder subjected to base PSDF input.
Required Steps to Perform Random Analysis
FEM Model
Frequency Response Analysis
Frequency Response Analysis Setup
Random Analysis – XY Plot
Random Analysis – RMS Stress Fringe Plot
11.6 Example 2: Table - Subjected to Simultaneous Random Excitation in Three Directions
Random Input Profile
11.7 Example 3: Plate - Subjected to Pressure and Point Load with Cross Spectrum Input
Frequency Response Analysis Setup
References
11.8 Appendix A
11.9 Frequency Response Setup Using Patran Interface
Frequency Response Setup - Patran Interface(Contd)