Optimization of Rigidly Supported Guyed Masts

Optimization of tall guyed masts using genetic algorithms

The aim of the article is to describe the procedure for mixed topology-size optimization of tall guyed masts, seeking the minimal mast weight with stochastic genetic algorithms. Given the height, geometrical in-plan and bracing schemes of the mast, loading and material data, the optimization procedure renders the explicit design of the mast including dimensions of all mast elements, attachment ...

Stress Optimization for Supported Bodies

For a surface traction t, acting on a region Γt of the boundary of a given body Ω supported on Γ0 ⊂ ∂Ω, we consider the infimum σ opt t = infσ {ess supx |σ(x)|} over all stress fields σ in equilibrium with t, i.e., the smallest essential bound on all conceivable stress fields. Using the space of LD-vector fields on Ω, we show that σ t is attainable by some stress field σ̂ and that σ opt t = sup ...

Modelling and Analysis Capabilities for Lightweight Masts

A Simplified Method for Dynamic Analysis of a Guyed Mast

The dynamic response of a guyed mast is relatively larger than for other structures. Thus a proper evaluation of the dynamic response is of major importance. The proposed simplified method separates the dynamic response into a low-frequency, background region and a high-frequency, resonant region. The background response has been estimated using patch loading. The resonant responses can be take...

On Rigidly Scalar-Flat Manifolds

Witten and Yau (hep-th/9910245) have recently considered a generalisation of the AdS/CFT correspondence, and have shown that the relevant manifolds have certain physically desirable properties when the scalar curvature of the boundary is positive. It is natural to ask whether similar results hold when the scalar curvature is zero. With this motivation, we study compact scalar flat manifolds whi...