Multibody Processing Library
The Multibody Processing library supports multibodyrelated, multidisciplinary workflows and systemlevel vibration analysis in time and frequency domains.
The library is based on linear steadystate analysis (modes) or nonlinear transient analysis (signals).
Usage
 Understand the contribution of nonlinear effects to system vibrations.
 Design and optimize system actuation and control over the operating range.
 Predict and control system stability and robustness over the operating range.
 Perform quantitative analysis of response timehistories in the frequency domain using Fast Fourier Transform (FFT).
 Perform analysis of system modes and computation of system Frequency Response Functions (FRF) at multiple operating points.
 Perform Cross Power Spectral Density (PSD) calculation between output and input signals to estimate the Frequency Response Functions for multiple parametric settings.
Installation
The library is packaged with Compose but requires installation before use.
To install the library, select Multibody Processing extension.
, then click the toggle button on theModules
The library includes three command modules: HyperStudy Utilities, MotionSolve PostProcessing and MotionView Utilities.
Module  Commands in this module  Usage 

HyperStudy Utilities 

Detect the time of events, and related index, to compute a response over a reduced time domain by leveraging the corresponding index range. 
MotionSolve PostProcessing for producing various plots based on MotionSolve outputs. 

Estimate Frequency Response Functions between multiple output signals and one single input signal by leveraging Cross Power Spectral Density. 

Compare plots of results in time and frequency domains by leveraging Fast Fourier Transform of multiple output signals.  

Compare plots of results in a frequency domain with computed FRF between multiple plant outputs and inputs by leveraging the output of A, B, C, D state matrices.  
MotionView Utilities 

Parametrize the definition of a cable system. 