Altair Seam Overview

What is Altair Seam Overview?

For more than 30 years, Altair Seam software has been providing a particularly suitable method of analysis for the study of the dynamic response of complex structures at medium and high frequencies.

The Altair Seam is used to predict noise and interior vibrations in automobiles, aircraft and cabins of construction equipment, as well as the irradiated noise of ships and the vibroacoustic environments of spacecraft. Other applications include machine noise, industrial noise and building acoustics.

Seam includes a full implementation of statistical energy analysis (SEA). The complex dynamic system analyzed is divided into a set of substructures and acoustic elements. The modes of each substructure and acoustic element are grouped into SEA subsystems. The energy flow between the different subsystems is proportional to the modal energies of the subsystems and the coupling factors. The Seam program calculates all the necessary coupling factors and performs a power balance for each subsystem. The resulting equations are resolved to the modal energy and response of each subsystem.

Benefits

Key features and benefits

• Industry-leading SEA Solver Speed
• Ability to incorporate predicted or measured stiffness or pressurization effects into hybrid MODELS of SEA
• Transient analysis for time-variable input loads
• Automatic or specified calculation of coupling loss factors and modal densities
• Corrections of transverse shear deformation for bending of all structural elements
• All damping and material properties can be specified as frequency-dependent
• Project sensitivity analysis
• Interface for structural optimization programs
• Automatic generation of SEA subsystems from structural and acoustic elements
• Automatic generation of SEA junctions for each degree of freedom of structural and acoustic connections of point, line and area
• Acoustic damping using loss factors, absorption coefficients or reverberation times
• Types of porous fiber or foam materials based on easily measured properties of flow resistivity tests or impedance tube
• Formulation of the transmission line to predict the loss or absorption of transmission through various layers of acoustic treatments, including fibers, foams, mass barriers, air intervals, panels.
• Ability to calculate the effects of cushioning, stiffness and mass of free and restricted layer structural damping treatments
• Special material models for alveolate materials, fibres and viscoelastics
• Options for modal density formulations
• Options for junction compliance, vibration and mass insulation assemblies
• Options for fluid loading, component loading and defined conductance
• Selection of runtime parameters, including frequency range and transients

Industrial Applications

Seam led the way in energy statistical analysis software. Developed in 1980 for infrastructure noise studies in submarines, seam quickly branched out to all sectors. They were the first commercial SEA software to be used in the marine, aerospace and automotive industries.

System requirements:

CPU: 1.8 GHz dual core processor

RAM: 2 GB

HDD / SSD: 50 GB of free space on the main drive

Operating system: Microsoft Windows 8 32-bit, Microsoft Windows 7 32-bit and Microsoft Windows Vista 32-bit

Resolution: 1024×768