Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

A high sensitive and large semi-anechoic chamber, designed by a new system of isolation is reported in this paper. The combined isolation of a large size elastic plate on sand cushion and pile barriers was used in this system. By properly designing the stiffness of elastic base plate, the amplitude of the anechoic chamber floor under the action of dynamic toad of testing vehicle can be controlled within the allowed range of accuracy. This new system has been conformed with the disturbance of outside of vibration on anechoic chamber (passive vibration isolation) and with that of vehicle testing inside the anechoic chamber (active vibration isolation). The cost of the anechoic chamber designed by the new system has been reduced by 93% compared with the traditional chamber, and also the period of construction was much shorter. It has been tested by the “Acoustics Research Institute of the China Academy of Science” that the background vibration of the anechoic chamber has met accurate requirement. It has been in use for quite a few years and great economic benefit has been made.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Combined Isolation Foundation by Elastic Base Plate and Ground Barriers

St. Louis, Missouri

A high sensitive and large semi-anechoic chamber, designed by a new system of isolation is reported in this paper. The combined isolation of a large size elastic plate on sand cushion and pile barriers was used in this system. By properly designing the stiffness of elastic base plate, the amplitude of the anechoic chamber floor under the action of dynamic toad of testing vehicle can be controlled within the allowed range of accuracy. This new system has been conformed with the disturbance of outside of vibration on anechoic chamber (passive vibration isolation) and with that of vehicle testing inside the anechoic chamber (active vibration isolation). The cost of the anechoic chamber designed by the new system has been reduced by 93% compared with the traditional chamber, and also the period of construction was much shorter. It has been tested by the “Acoustics Research Institute of the China Academy of Science” that the background vibration of the anechoic chamber has met accurate requirement. It has been in use for quite a few years and great economic benefit has been made.