Engineering Design And Numerical Calculation Of Gross Floor Air Conditioning Unit Isolation Bearings

Dynamic devices such as machine module of air-conditioner are laid on the first story or upper story of the skyscraper and multi-story factory When the disturbing force from dynamic devices is less than 600N, the vibration characteristics of the floor can be determined according to Resistance Micro-Vibration Design Code for Multi-story plant Floor . If the disturbing force from dynamic devices is larger than GOON, it is necessary to use isolators between dynamic devices and the floor for reducing the vibration response of the floor. So it is urgent to determine the optimum isolator for obtaining the expected effect of vibration isolation.In this thesis an actual example about a gallery for air-conditioning of some factory on which the force from dynamics devices is acted has been studied by use of space dynamic finite element programs. Two different cases are studied. In the firs one, the isolators are used, and the isolators are not used, in the second one. Two kinds of isolators named combined-isolators and spring-isolators are designed also. And the parameters of isolators are determined with two different methods:1)a simple method used in practical engineering;2) the method of space dynamic finite element. Finally, the results of the two methods are compared and analyzed.