Author:
Khalaj Omid,Zakeri Reza,Tafreshi Seyed Naser Moghaddas,Mašek Bohuslav,Štadler Ctibor
Abstract
Abstract
Placing a machine footing over a small thickness of soil layer, which is located over a bedrock, could encounter many challenges due to the bed’s notable stiffness in comparison to the soil. The advantages of using rubbers to protect facilities (structures, machine foundations, nearby footings and equipment, etc.) from vibration and control its consequences are well known nowadays. In this study, the benefits of employing a small thickness of rubber sheet (2 mm) on the dynamic response of a machine foundation which is located over four thicknesses of soil (210, 420, 630, and 840 mm) has been investigated. The soil layer is located over an artificial bedrock that is consisted of a thick concrete layer. The tests have been conducted in a vast test pit of size 2500×2500 mm and a depth of 840 mm by using a semi large-scale machine foundation model with a square concrete foundation of width 400×400×100 mm. It was observed that, by increasing the soil layer thickness, the resonant frequency and amplitude of the vibrating system decreases. Moreover, by employing a rubber sheet beneath the machine footing, the resonant frequency of the vibrating system significantly decreases especially for a small thickness of the soil layer. Although, using a rubber sheet could slightly increase the resonant amplitude, but the benefit of the resonant frequency-changing capability of the rubber sheet is too impressive by taking the resonant frequency of the system far enough from the unchangeable working frequency of the machine and preventing the resonant phenomenon to happen.
Reference34 articles.
1. The Dynamic Principles of Machine Foundations and Ground;Crockett;Proceedings of the Institution of Mechanical Engineers,1949
2. Foundation Isolation Solutions for Equipment & Machines;Fabreeka,2013
3. Analysis of Machine Foundation Vibrations: State of the Art;Gazetas;International Journal of Soil Dynamics and Earthquake Engineering,1983
4. Response of Circular Machine Foundation Resting on Sandy Soil to Harmonic Excitation;Kaream;Journal of Engineering Science and Technology,2020
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献