• Rapidly analyze modelfrequency response at differentoperating points

• Run design studies, DOE, andoptimization using vibrationspecific objectives

• Use frequency dependent (FD)modeling elements such as Pfefferand simple FD bushing

• Include effects of flexible bodies,hydraulics, controls, and usersubsystems

• Choose from a variety of kinematicand force inputs for frequencydomain analysis

• Powerful set of forcing functionsincluding swept sine, PSD, rotationalimbalance, user defined

• Post-process graphically withanimations, 2D and 3D plots, energytables and more

• Process capture enabled withextensible Python scripting language

• Leverage your model in otherprograms through export of statematrices [ABCD]

• Reuse validated motion models tostudy systems level NVH attributes

• Improve correlation with test datathrough better understanding ofsystem response

• Rapidly pinpoint modelparameters effecting overallsystem frequency response

• Optimize NVH performancecharacteristics

CAPABILITIES

BENEFITS

ADAMS/Vibration™

OVERVIEW

WORK FASTER AND SMARTER

With ADAMS/Vibration, you can use virtual testing for vibration studiesin place of physical tests using shaker devices. Physical testing in thefield is expensive and typically can occur only at later stages of thedesign process. Using ADAMS/Vibration, you can perform these testsearly in the design process, cutting down on design time and expense.

Noise, vibration, and harshness (NVH) is a critical factor in the perform-ance of many mechanical designs, such as vehicles, railcars, and satel-lite systems. But designing for optimum NVH can be problematic.Excitations in one part of a system may interact with another part ofthe system, creating problems and making isolation of the cause diffi-cult. Design parameters to achieve optimum NVH often conflict withother attributes such as durability and dynamic performance. And phys-ically testing NVH performance is time-consuming and expensive.

ADAMS/Vibration, a plug-in environment for the MSC.ADAMS productline, allows you to study forced vibrations of your MSC.ADAMS modelsusing frequency domain analysis. For example, describing both inputsand outputs as vibrations in the frequency domain you can simulate anMSC.ADAMS model of an automobile being driven over a bumpy road.Using ADAMS/Vibration, you can assemble models of various subsys-tems, perform linear vibration analysis, and use MSC.ADAMS post-pro-cessing tools to provide root cause analysis and design target settinganalysis. Output data can be used in NVH studies to predict the impactof vibration on passenger comfort in an. automobile, train, plane, orother vehicle. You can also include the effects of hydraulics and con-trols on system behavior.

ADAMS/Vibration lets you investigate vibratory response of high-fidelity system models toimprove NVH attributes. Quieter ride, better isolation, higher quality ... imagine the possibilities!

Study system-level vibration inyour MSC.ADAMS® models using

frequency domain analysis

PRODUCT LINESimOffice™

Product FamilyMSC.ADAMS®

BUILDInstrument your model• Create vibration inputs and actuators• Create vibration output measurements• Incorporate frequency domain modeling elements

IMPROVE Optimize design• Utilize vibration and motion design objectives• Design study • Design of Experiments (DOE)• Design optimization

REVIEWPlot and visualize results • System modes• System frequency response• Power Spectral Density (PSD)• Modal Participation tables• Component energy distribution• Animate system response at forcing frequencies

TEST Perform frequency domain analysis• Simulate model to operating point• Compute normal modes• Compute frequency response• Compute modal energy distribution in modes

THREE REASONS TO USE ADAMS/Vibration• Take your system to different operating points to analyze vibratory behavior without having to create new models• Include effects of hydraulics, controls, and other subsystems on vibration characteristics• Analyze system modes including attachment and other nonlinear characteristics

RAILCAR EXAMPLE• System eigenvalues shift according to:

– Equivalent conicity– Suspension stiffnesses– Damper characteristics– This shift affects railcar stability and running comfort

Post-processing capabilities allow visualization of modal energy distribution in a flexible body during forced vibration animation. Through the use of contour plots,you can identify regions of energy concentration in a flexible body at a given frequency. In the above sequence of images you can see how the kinetic energydistribution changes for a flexible sheet when simulating an out-of-balance condition for a centrally mounted motor.

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All other products names, brand names, or trademarks belong to their respective owners.

© 2004 MSC.Software Corporation. All rights reserved.ADAM*2004NOV*Z*VIBR*Z*LT-DAT

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Customer Care Center:

1 800 642.7437 (U.S. only)1 978 453.5310 (International)customer.care@mscsoftware.com

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AUTOMOTIVE EXAMPLE• Engine mount displacements due to combustion forces in dependency of:

– Engine mount characteristics– Engine mount position

• Frequency domain analysis helps designers improve engine mount installations