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Brain And Cognitive Sciences Project Rail vibration, Transfer mobility testing

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QSG is a Chief Engineering Scientist, Consulting Engineer, Research Scientist, Noise and Vibration Control Specialist, Acoustics, Structural And Machinery Dynamics, Noise And Vibration Control, And Stress Analysis Consultant with world-class expertise in structureborne sound, structural and machinery dynamics, noise and vibration control, and stress analysis.

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A rail line carrying 2-3 heavy freight trains per day passes through MIT's Brain and Cognitive Sciences Center. The Institute was initially concerned about vibrations from the trains that may effect sensitive equipment planned for the Center, including 2-photon microscopes, electrophysiology rigs, and MRI machines.

This consultant measured the vibrations from freight trains and performed transfer mobility tests to determine ground vibration propagation at the site. This consultant measured the vibrations from 36 freight trains over two-weeks, and recorded vibrations from six sensors (3 surface sensors and 3 subsurface sensors at the bottom of boreholes up to 115 feet deep). The recorded data was later post-processed to obtain the vibration time waveform as well as vibration spectra (frequency distributions) from each train passage. This consultant's seismic hammer imparted a known force pulse to the ground near the train tracks. This consultant used transfer functions between the sensors and the applied force to calibrate a numerical model of the ground which in turn was used to evaluate the vibration isolation potential of various foundation schemes and building constructions.

This consultant used the rail-induced vibration data to determine the required vibration isolation to protect the sensitive equipment in the building and to assess the effects of rail vibration on the building's researchers.

Read other articles by this KKAI Associate:

Massachusetts Institute Of Technology Vibration Isolated Inertia Block

New York Structural Biology Center Vibration Measurements and Analysis

National Institute Of Standards And Technology

Beth Israel Deaconess Medical Center Vibration survey and analysis

National Neuroscience Research Center Vibration Analysis

Chief Engineering Scientist, Consulting Engineer, Research Scientist, Noise and Vibration Control Specialist, Acoustics, Structural And Machinery Dynamics, Noise And Vibration Control, And Stress Analysis Consultant, structureborne sound, structural and machinery dynamics, noise and vibration control, and stress analysis.
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Kevin Kennedy & Associates, Inc.
Rapid Response Engineering® Solutions
3905 Vincennes Road, Suite 320
Indianapolis, Indiana 46268
(317) 536-7000 voice
(317) 536-7220 fax

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