Response Dynamics Logo
Since 1984 - Now in Our 33rd Year
Contact Us:
Reuben Hale, P.E.
Ph: (510) 507-1300
email: Reuben@ResponseDynamics.com

SERVICES:

- High Tech Consulting

- Heavy Industry Consulting

- Facility Design Consulting

- Product Vibration & Noise

- Emergency Solutions

- Vibration Consulting

- Acoustic Consulting

- Vibration & Noise Monitoring

- Construction Monitoring

- Site Testing & Analysis

- Diagnostic Testing

- Sensitivity Testing

- Vibration & Noise Isolation

- Modal & Resonance Testing

- Finite Element Modeling

- Shake Table Testing

- Strain Gage Testing Services

- Servo Control Consulting

- Thermal Testing & Design

- Magnetic Field / EMF / EMI

About Us / Partial Client List

Overview Vibration Characterization Dynamic Testing Damping Treatments Time Domian Analysis
Vibration Characterization
- Vibration Consulting : Vibration Characterization

Vibration Characterization involves documenting the offending disturbances in the time domain and/or frequency domain. Steady vibration disturbances are often best characterized by the frequency components of the disturbance. Transient disturbances are often characterized in the Time Domain. We analyze the disturbance in both domains using a variety of signal processing and analysis hardware and software, however our most valuable resource is our experience and judgment.

Semiconductor AFM Tool Response to
Environment
Fatigue Cracking on Turbine foundation

Note that we very often make measurements of different signal types, such as vibration, acoustic noise, pressure, strain, air flow, current, voltage, etc. Making a measurement that is actually useful can be challenging and depends not only on the quality of the measurement, but also on an understanding of the particular structural dynamics at hand.

For instance, our initial evaluation of the dynamics influences the choice of measurement location, sensor, sensor mounting, length of capture, bandwidth, windowing, and an idea of what to expect and how to interpret it. We provide this understanding as part of our vibration testing services to quickly and efficiently characterize the root of the vibration problem and the dynamics at play.

Shipping Vibration Characterization
for Hard Disk Rack
Hard Disk Rack Vibration Test Rolling Over Bumps

In the real world there are judgments that must be made as to where to mount sensors to capture a good representation of the vibration response. Often we are testing structures and products that are not complete, partially built and missing components. This is because the working products are often in use. We look at the working equipment, structures, products, consider the mass distribution, stiffness peculiarities, how pieces are put together on the working system, and come up with modifications to the test setup to better represent real structure.

Semiconductor Turbo Pump Characterization Helecopter Instrument Vibraiton, Engine Mount
Modifications

This is our Bread and Butter and we are good at it.

Here is a list of some common vibration characterization measurements:


We consider the expected frequency range and select our sensors and their mouting dynamics appropriately. Often we dont know what to expect exactly until we are on site looking at the disturbance spectra and waveform. We then have the judgment and experience to make modifications to our test setup and instrumentation to get meaningful measurements that will answer the pertinent questions being asked.

Thermal Performance and Vibration Optimization Spectra of Vibration on Turbine foundation





- Vibration Consulting Topics Include:
Overview, Vibration Characterization, Dynamic Testing, Damping Treatments, Time Domian Analysis

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