Stress analysis on rigid hanger of steam pipeline

Abstract

Abstract:

The deformation and stress concentration of steam piping hanger are important to the safety of pipeline and equipment in the rmal power plants. Finite element analysis is adopted to conduct 3D modeling of steam piping rigid hanger for a 300MW coalfired generating unit. Steady state research is carried out under rated working condition and transient processes of varying load rates are studied. The temperature field, thermalstructural coupled stress field and deformation distribution of the rigid hanger are obtained from the studies.The results indicate that the maximum equivalent stress of the rigid hanger is up to 190.1MPa under rated working condition,and the stress concentration mainly occurs at pipe clamps,supports and bolts.When the load changes rapidly,the equivalent stresses of bolts and pipes change greatly,reaching 109.0MPa and 122.1MPa respectively.The equivalent stresses of pipe clamps,hanger rods and supports changes lightly.Changing load acceleration has little effect on the range of equivalent stress variation.

Key words:

">">thermal power plant, steam pipeline, supports and hangers, stress concentration, changing load acceleration, temperature field, 3D modeling, finit element analysis

SONG Zhanbing1，FAN Peipei2，WEI Jiang1，LIU Baolin1，LI Gen2，CHONG Daotong2.

Stress analysis on rigid hanger of steam pipeline

[J]. Huadian Technology, 2019, 41(4): 1-5.

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Stress analysis on rigid hanger of steam pipeline

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