The toolbox for spectrum analysis, statistics and more

DuraTools™ gives you the capability you need for fatigue analysis, durability analysis and environmental engineering. Particularly, DuraTools contains the tools you need to create test spectra for a vibration test from field data of vibration signals. With DuraTools, you have access to Shock Response Spectra (SRS), various other response spectra, rainflow counting, Palmgren-Miner damage estimation, and more! Methods are included for any mechanical environment regardless of whether it is of periodic, random or transient nature.

Durability Analysis

DuraTools includes functions for experimental analysis of fatigue with reduction schemes such as range pair and rainflow counting. You also have advanced possibilities to compute responses from mechanical systems with known mass, damping and stiffness matrices, or with poles and residues. Standard mean/range plots etc. are available as well as cumulative damage estimation using Miner’s rule.

Environmental Engineering

If you work with environmental engineering and want to compute vibration test spectra from measured or synthesized data, DuraTools is the way to do it! With the advanced functions for classification of signals according to ISO standard TS10811-2 (Vibration and Shock in Buildings with Sensitive Equipment - Classification), you can easily define a sine test from measured data. Or, with methods such as shock response spectra, and response equivalent peak velocity according to ISO TS10811-1 (Vibration and Shock in Buildings with Sensitive Equipment – Measurement and Evaluation), etc., DuraTools is the state-of-the-art platform for designing test spectra that truly corresponds to your random and/or shock environment. Among the examples shipped with the toolbox, there are demonstrations of various strategies to find random test specifications from measured data, and also to test whether a shock test is required for given measured data.

Mechanical Simulation

When you are dealing with damage effects of measured vibrations, you may want to simulate what effect the vibrations have on a model of your mechanical system. Therefore, we have included our unique forced response algorithms available in ModalTools, also in DuraTools. See the section “Mechanical Simulation” under ModalTools for more information.

Key Features

• Standard data storage format with header values for noise and vibration signals, such as measurement position, direction, etc
• Triple Gaussian probability density function fit of data
• Functions for data quality assessment and classification of signals, including environment classification as defined by the standard ISO TS 10811-2
• Level crossing, rain flow counting, and peak valley counting
• Fatigue damage spectrum and shock response spectrum computations from time data, including response equivalent peak velocity according to ISO TS 10811-1.
• Palmgren-Miner damage estimation.
• Conversion routines to/from various spectra
• Shock indicator function; computes if a signal contains shocks, i.e. if a shock test is necessary to simulate the environment.
• Time data filtering through mechanical models, through SDOF filters and more.
• Time data synthesis from PSD or pseudo velocity spectra.
• Frequency response synthesis from mechanical models.
• 3D maps of pseudo velocity and SRS.

Requirements

• MATLAB 5.1 or higher from The MathWorks Inc.
• Signal Processing Toolbox from The Math-Works Inc.
• VibraTools.

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