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Static, Harmonic and Fatigue Analysis of a Casing Oscillator
Atta ur Rehman Shah(샤아따울레만),Addul Wasy Zia(압둘와지지아),Kim Chang Uk(김창욱),Song Jung-il(송정일) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5
Casing oscillators are used to extract rocks and soil from depth of the earth during foundation work of buildings, bridges and drilling operations. Hydraulic piston cylinders are used in this equipment to produce torque for shaking of the pipe inside the drill hole. Due to the consistent torque loadings the oscillator is always under a vibrating load of known frequency. Hence there occurs fatigue failure in some parts of the machinery. This study is a finite element analysis of an existing design of the casing oscillator under the operating conditions. Static, harmonic and fatigue analyses are performed under real loadings. Critical areas of the design and fatigue life of the components are predicted.