The Empirical Assessment of Human Vibration Propagated in Building and Hvac Systems



Forouharmajd F¹ ; Ahmadvand M² Show Affiliations
Source: INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control Published:2014

Abstract

Researchers in vibration have shown that disorders of a heart-cardiovascular circle appeared by vibration exposure. In the first step of doing work, the vibration accelerometer put on the base of a fan where the vibrations send toward the duct wall. Vibration assessment of building is done in the other steps to compare with guidelines. The vibration rates in these areas should not be more than recommended values of ASHRAE for buildings. The methods tried including the isolator and balancing duct. By placing the isolator on the duct wall, the accelerometer locates on the body of duct wall and the value of vibration measured in a millimeter per seconds. A Peak reduction of vibration velocity in building has been appeared at frequency of 68.5Hz by a value of 33mm/s after applying isolation. For other parts of the vibration rate of the frequency's band, the taken results prove a proper cut of vibration paces. There were exceptions in the cut of vibration rate for frequencies, including 627.2 and 636Hz, but the increased amounts are excusable. Thus, applying the methods of control may be acceptable, but it could not cover few parts of vibration frequency band spreading in building.