Stress analysis on the major parts of a bulb turbine using FEA-A case study

Abstract

<span style="color:black;mso-bidi-language:HI">In the bulb turbine<span style="color:#040404;mso-bidi-language:HI">, <span style="color:black; mso-bidi-language:HI">main shaft and st<span style="color:#040404; mso-bidi-language:HI">a<span style="color:black;mso-bidi-language:HI">y co<span style="color:#040404;mso-bidi-language:HI">l<span style="color:black;mso-bidi-language:HI">umn play important role. Main shaft is positioned horizontally. More stress concen<span style="color:#040404; mso-bidi-language:HI">tra<span style="color:black;mso-bidi-language: HI">tion occurs ne<span style="color:#040404;mso-bidi-language:HI">ar <span style="color:black;mso-bidi-language:HI">the junction of <span style="color:#040404;mso-bidi-language:HI">s<span style="color:black; mso-bidi-language:HI">tay column with concrete at th<span style="color:#040404;mso-bidi-language:HI">e <span style="color:black; mso-bidi-language:HI">top and bottom, since the entire lo<span style="color:#040404;mso-bidi-language:HI">a<span style="color:black; mso-bidi-language:HI">d is being taken car<span style="color:#040404; mso-bidi-language:HI">e <span style="color:black;mso-bidi-language:HI">of by stay columns at the top and bottom. A finite el<span style="color:#040404;mso-bidi-language:HI">e<span style="color:black; mso-bidi-language:HI">ment analysis <span style="color:#040404; mso-bidi-language:HI">(<span style="color:black;mso-bidi-language:HI">FEA) has been made using ANSYS software to find out structural stability with str<span style="color:#040404;mso-bidi-language:HI">ess <span style="color:black; mso-bidi-language:HI">distribution for bulb turbine and the reasons for high vibration and vertical cracks in th<span style="color:#040404; mso-bidi-language:HI">e co<span style="color:black;mso-bidi-language: HI">n<span style="color:#040404;mso-bidi-language:HI">c<span style="color:black;mso-bidi-language:HI">r<span style="color:#040404; mso-bidi-language:HI">e<span style="color:black;mso-bidi-language:HI">te structure <span style="color:#040404;mso-bidi-language:HI">of <span style="color:black;mso-bidi-language:HI">th<span style="color:#040404; mso-bidi-language:HI">e <span style="color:black;mso-bidi-language:HI">powerhou<span style="color:#040404;mso-bidi-language:HI">s<span style="color:black; mso-bidi-language:HI">e<span style="color:#454545;mso-bidi-language: HI">. <span style="color:black;mso-bidi-language:HI">R<span style="color:#040404;mso-bidi-language:HI">es<span style="color:black; mso-bidi-language:HI">ults from FEA <span style="color:#040404; mso-bidi-language:HI">a<span style="color:black;mso-bidi-language:HI">n<span style="color:#040404;mso-bidi-language:HI">a<span style="color:black; mso-bidi-language:HI">lysis show that the bulb turbine operation is s<span style="color:#040404;mso-bidi-language:HI">a<span style="color:black; mso-bidi-language:HI">fe when the st<span style="color:#040404; mso-bidi-language:HI">ay <span style="color:black;mso-bidi-language: HI">columns <span style="color:#040404;mso-bidi-language:HI">a<span style="color:black;mso-bidi-language:HI">re <span style="color:#040404; mso-bidi-language:HI">f<span style="color:black;mso-bidi-language:HI">i<span style="color:#040404;mso-bidi-language:HI">t<span style="color:black; mso-bidi-language:HI">t<span style="color:#040404;mso-bidi-language: HI">ed w<span style="color:black;mso-bidi-language:HI">ith p<span style="color:#040404;mso-bidi-language:HI">i<span style="color:black; mso-bidi-language:HI">pe ja<span style="color:#040404;mso-bidi-language: HI">c<span style="color:black;mso-bidi-language:HI">k<span style="color:#040404;mso-bidi-language:HI">s. <span style="color:black; mso-bidi-language:HI">Thi<span style="color:#040404;mso-bidi-language: HI">s <span style="color:black;mso-bidi-language:HI">method r<span style="color:#040404;mso-bidi-language:HI">e<span style="color:black; mso-bidi-language:HI">du<span style="color:#040404;mso-bidi-language: HI">c<span style="color:black;mso-bidi-language:HI">e<span style="color:#040404;mso-bidi-language:HI">s <span style="color:black; mso-bidi-language:HI">stress concentration at the junction of stay column with <span style="color:#040404;mso-bidi-language:HI">c<span style="color:black; mso-bidi-language:HI">on<span style="color:#040404;mso-bidi-language: HI">c<span style="color:black;mso-bidi-language:HI">r<span style="color:#040404;mso-bidi-language:HI">ete.

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