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Mechanics in Engineering ›› 2013, Vol. 35 ›› Issue (6): 38-43.doi: 10.6052/1000-0879-13-129

• Applied Research • Previous Articles     Next Articles

STABILITY ANALYSIS FOR TANK-ROOF BASED ON RELIABILITY

HE Wang1, LIU Lichuan1, LI Huanan1, XIE Gang2   

  1. 1 Department of Petroleum Supply Engineering, Logistical Engineering University, Chongqing 401311, China;
    2 78539 Army in Jiajiang, Sichuan, Leshan 614100, China
  • Received:2013-03-30 Revised:2013-07-13 Online:2013-12-08 Published:2013-12-19

Abstract:

A reliability analysis model is established to analyze the stability of a tank based on the tank-roof stability checking formulae and the reliability theory. A new method for calculating and analyzing the reliability and the stability of the tank-roof by the minimum distance and finite difference methods is proposed. The analysis results of the tank as an engineering example by the proposed methods show that the self-supporting role of the roof-plates and the strengthened role of stiffened ribs would affect the reliability index of the tank-roof under different external loads. The curve fitting method is applied for expressing the numerical relationships between the reliability index and affecting factors. A reliability assessment is also performed to show the feasibility of analyzing the stability reliability of the dome roof for storage tanks in service.

Key words:

tank dome-roof|reliability|stability analysis|minimum distance method|finite difference method

CLC Number: 

  • TB114.33