Finite Element Analysis of Hyperbolic Cooling Towers

1. Front Matter

   Pages N2-VIII

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2. Introduction

   • Seyyed Mohammed Niku

   Pages 1-3

3. General Theory of Thin Elastic Shells

   • Seyyed Mohammed Niku

   Pages 4-7

4. Linear Analysis of Thin Shells of Revolution, Using Finite Element Method

   • Seyyed Mohammed Niku

   Pages 8-62

5. Hyperbolic Cooling Towers on Discrete-Flexible Support System

   • Seyyed Mohammed Niku

   Pages 63-96

6. Hyperbolic Cooling Towers with Geometric Imperfection

   • Seyyed Mohammed Niku

   Pages 97-140

7. Non-Linear Analysis of Hyperbolic Cooling Towers

   • Seyyed Mohammed Niku

   Pages 141-192

8. Back Matter

   Pages 193-216

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The analysis of thin shells of revolution in general has always occupied an important place in the theory of structures, and recently the problem of hyperbolic cooling towers has attracted many investigators due to the wide use of such shells in industry. Until the early 1960's these towers were of moderate size, probably not exceeding 76m (250ft) height. In this range, the structural safety and stability were not of primary concern because, the minimum wall thickness and reinforcement were sufficient to provide the required safety. It was not necessary to use very rigorous methods to analyse the problem. The analysis involved the following assumptions, i) flexural stresses were ignored (membrane tneory), ii) The geometry of the shell was assumed to be perfect and to be idealised as a set of straight sided conical frusta, and iii) The boundary conditions at the base were taken to be fixed or continuously hinged with full tangential restraint.

• calculus
• finite element method
• geometry
• linearity
• simulation
• stability
• transformation
• wind

• Computational Mechanics Consultants, Ashurst, Southampton, UK

  Seyyed Mohammed Niku

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