VBT 3.0 is an all-in one solution for designing and testing damping materials. VBT 3.0 allows structural materials engineers to design better and quieter products. In its third iteration, our VBT System has been developed from data collected in over 30 years solving complex, real-world noise and vibration challenges.
The VBT package consists of a PC workstation, data measurement tools, and a comprehensive suite of software specifically designed for noise and vibration control.
DTI continually updates and improves this VBT system based on our cutting-edge work. Today, VBT 3.0 is considered the leading software of its kind.
VBT 3.0 uses the Vibrating Beam Technique (VBT) to measure viscoelastic material properties in a variety of environments and applications. VBT’s revolutionary software allows users to then utilize these characteristics to design effective surface damping treatments. Three separate software programs were developed to perform these tasks.
VBT Measurement Module Data acquisition hardware and software system that automates the measurement of composite beam properties as a function of temperature.
VBT Post Processor Module Extraction of dynamic material properties, data display, Jones Temperature / Frequency Nomogram, and curve-fitting.
VBT Damping Treatment Design Module Predicts the effects of numerous design parameters to optimize damping in “real-world” engineering structures.
DTI’s VBT Measurement System was created with the emphasis on flexibility and ease of use. The package has been thoughtfully created by structural dynamics engineers who have logged extensive experience using the Vibrating Beam Technique. As knowledgeable individuals realize, there quite simply is no substitute for experience regarding these measurements. Experience is crucial to the success of any material property measurement capability and is certainly a key ingredient of this particular effort.
The VBT Measurement System consists of:
1. PC Computer with Windows OS
2. Data Acquisition Hardware
3. Data Acquisition Software
4. Material Property Processing Software
5. Damping Treatment Design Software
6. Environmental Chamber (Optional)
7. Beam Fixture(s) and Start-up Kit (Optional)
Although many test techniques have been used to measure dynamic mechanical properties of viscoelastic materials, the vibrating beam technique is often utilized because it is conductive to routine data acquisition over wide temperature and frequency ranges.
This technique is based upon analysis developed by Ross, Kerwin, and Ungar (RKU) in which the dynamic material properties of viscoelastic materials can be extracted from measurements made on homogeneous beams as well as composite beams. The composite beam is a generalized term referring to a beam that consists of viscoelastic material in combination with a metal beam (or beams). These can be configured to yield properties in shear or extensional states of stress. Evaluating material properties for a number of material properties. Placing the test fixture inside an environmental chamber can establish the effects of temperature.
The technique has been adopted by the American Standards for Testing of Materials as the preferred method for determination of the damping properties of materials. The details of the procedure can be found in ASTM E-756-98.
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