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Vibration Analysis & Seismic Simulation (VASS)



Answer Vibration & Seismic Questions Quickly and Reliably


Aeroacoustic Engineering Consultants, LLC (AEC) is recognized world-wide as an authority in the combined science of acoustics and aerodynamics, or aeroacoustics. As such, AEC engineers are experts in applying advanced finite element analysis (FEA) modeling technologies to complex mechanical and architectural design problems and provide client management-design teams with the answers to needed to implement the next level of advanced, high performance component/system/building designs or diagnose and remediate an existing problem.

A natural progression to FEA computer modeling is the application to vibration analysis, and seismic simulations (VASS). VASS allows any frame, beam, and plate type structure (or integrated beam and plate structure) to be modeled and solved for loads and stresses or for vibration modes and frequencies, including seismic response.  VASS is designed to be a general and practical application that will allow the client to tackle a large variety of structural engineering projects from the very large to the very small in a short amount of time.

A principal emphasis in VASS is the understanding and predicting the behavior of structures under various seismic site classifications, Importance Factor, Response Modification Factor, Amplification Factor (IBC Standards typical) and including static and/or dynamic loads. Consequently it is a valuable developmental tool as well as a powerful vibration predictive analysis instrument.

Advanced analysis features include buckling, beam-column effects and incremental solutions for larger displacements as well as shock and seismic solutions.

Shock and Seismic analyses

Typical test spectrum protocol (IBC / UBC)

Shock and Seismic loads are calculated using a response spectrum and the natural modes of the vibrating structure. The program provides for construction of UBC and IBC seismic spectrums and has a general spectrum editor for custom spectrums for any type of shock analysis (e.g. equipment shock mounting).

3-Dimensional View of Structure or System Dynamics


3D finite element models for structural loads and stresses

Beam load and stress diagrams

Thermal loads & pre-loads

Stability and buckling

Beam-columns (P-delta)

Plate loads and stresses

Von Mises, principal, traverse, and planar stresses

Ranking and coloring of stresses and loads in both beams and plates

Functional coloring schemes

Plate bending and in-plane loads and stresses

Boundary conditions include springs, elastic foundations, and specified displacements

Special structures insertion such as arcs, circles, Bezier, parabolic, pivot joints and others

Vibration modes and frequencies (ANIMATED)

Vibration animation video clips

Vibration with static loading

Shock load analysis

Seismic spectrum analysis

AISC steel and Aluminum Association section property databases

European and Australian steel databases

Beam elements (tapered, pinned, or flexible pins, eccentric, deep shear)

(Plus many more computer model features)


Oil tank with slope adjusted snow loads

Onsite, empirical vibration measurements
utilizing multi-channel, FFT data acquisition

Utilizing AECs simulation capabilities during a projects design phase achieves cost effectiveness through system efficiencies and confirms theoretical concepts. As a diagnostic tool, expensive and wasteful cut and try efforts are avoided! By 3-D computer modeling dynamics of a prospective or existing design, VASS provides insight into how the system will perform based on a proven scientific foundation. When needed, vibration and/or shock may be empirically substantiated with vibration testing utilizing AECs portable instrumentation and FFT data acquisition systems.

AECs vibration design analysis and/or remediation diagnostics will provide an engineering management team with solid answers for quick decisions, optimal design selection, cost savings and last but not least a little peace of mind!

Download the PDF Datasheet Below by Clicking on Link


Copyright 2010 Aeroacoustic Engineering Consultants, LLC
Last modified: March 03, 2011