August 2008

Special Report: Fluid Flow and Rotating Equipment

Designing rectangular block foundations for vibrating equipment

Method considers both the effect of damping and coupled modes using time-history analysis

Chakravarti, K., Petrofac International Ltd.

Unless there is a process/ functional requirement for placing rotating equipment foundations at certain elevations, they are normally reinforced concrete block foundations on the ground or elevated framed structures. Normal practice. In general, civil engineers choose one of the two methods for designing reinforced concrete block foundations for vibrating equipment, each having its own advantages and disadvantages: Barkan's method1 Arya, O'Neil and Pincus' method.2 Barkan's method is simpler and is used in most countries, especially third-world and middle-east countries. It accounts for the coupled mode of vibration, i.e., longitudinal translation with pitching and lateral trans

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