Reliability Analysis for Structure System with the Local Dented Plate

Abstract

In this paper, the influence of the local dented plate on ultimate strength is analyzed, and reliability calculation and sensitivity analysis expressions of the plate element with local dents are also proposed. For the structure system consisting of local dented plate elements, reliability analysis is developed, the calculation method of the global reliability index and sensitivity expressions of the reliability index are proposed. Finally, taking a numerical example of a cabin section of ship structure compares and contrasts reliability analysis of the structure system with the local dented plate with that of the system without the local dents. The method proposed in this paper provides a reference for the maintenance and renewal of structure system in use.

Numerical Study about Combined Effect of Distributed Initial Imperfections and Dent on Ultimate Strength of Square Plates under Uni-Axial Compression

“…Hai et al [5] studied the influence of multiple defects namely initial distortions, weld residual stresses, cracks and local dents on ultimate strength of the plate and also derived expressions for reliability index and sensitivity analysis of the plate. Hai et al [6] in their work, proposed a method to determine global reliability index and sensitivity expression of reliability index of the plate structure with a local dent based on ultimate strength reduction factor. Raviprakash et al [7] in their work, numerically studied about the effect of transverse/longitudinal dent on the ultimate strength of a thin square plate under uni-axial compression and it was concluded that transverse dent affect the ultimate strength more drastically than the longitudinal dent.…”

Reliability Analysis for Structure of Airborne Air Conditioner

“…Since the 1970 s TAGUCHI proposed the three design method to reduce the influence of uncertain factors on the quality, reliability design has been applied in many fields [1] [2]. Due to the random factors such as material properties, geometrical characteristic of structural member, load history and environmental condition, the fatigue life of structure often deviates from the design life of the airborne air conditioner.…”