Monte‐Carlo simulation‐based analysis for structural reliability of the crane rail beam under stochastic crane movements and irradiation conditions

Abstract

This study presents a Monte-Carlo simulation-based approach to investigate how stochastic crane movements affect the structural reliability of the rail beam considering radiation effects. In the simulation, the rail beam loaded under a stochastically moving crane is discretized into 47 equispaced structural points for calculating its strain profile. Then the structural reliability at each structural point is calculated with the consideration of irradiation creep, represented as an accumulated strain over a given period of time. And the rail beam reliability is determined by the minimum value from the reliabilities calculated at different structural points, according to the weakest link principle. In our simulations, three candidate distributions, including the normal distribution, uniform distribution, and 3-parameter lognormal distributions respectively, are applied to describe the stochastic distances of the crane. It can be seen from the simulation results that the rail beam reliability degrades with the most rapid rate when the crane distances follow a normal distribution, compared to the other two distributions. This paper offers a possible way of using the proposed Monte-Carlo simulation-based method to carry out reliability analysis and improvements for the rail beam working in extreme environments, such as irradiation conditions, with random operational tasks.

Dynamic response and safety analysis of polyethylene pipeline under rockfall conditions

“…[29][30][31][32][33] The limit state of a pipeline is a crucial index for assessing whether the pipeline can operate safely. 28,34 A plastic failure is the expected failure mode under rapid and large deformation scenarios such as rockfall impact, and it is reasonable to consider material failure when the yield strength of PE material is achieved. The buried PE pipeline system for gas use specifies the minimum required strength of pipe, but does not prescribe the pipe strain requirements.…”

“…The limit state is a fundamental concept in reliability theory that describes the critical safety index of a structure or its failure 29–33 . The limit state of a pipeline is a crucial index for assessing whether the pipeline can operate safely 28,34 . A plastic failure is the expected failure mode under rapid and large deformation scenarios such as rockfall impact, and it is reasonable to consider material failure when the yield strength of PE material is achieved.…”

Fatigue reliability assessment of offshore catenary risers conveying internal slug flow

“…Fatigue is often quantified using the Palmgren-Miner rule, which predicts the fatigue of a structure subjected to a sequence of cyclic loading based on the accumulated damage from each cycle. [31][32][33] The number of cycles that a structure can withstand before failure depends on the stress amplitude by referencing the S-N curve, which relates the number of cycles to failure for a given stress amplitude. 34 For offshore risers, the axial stress S at a specified time t can be obtained by the tension T e and bending moment M b as:…”

Operational Reliability Analysis of Turbine Blisk Using an Enhanced Moving Neural Network Framework

“…In the reliability design of engineering structures, numerous methods have emerged. Qian et al employed an improved Monte Carlo (MC) simulation to implement the structural reliability of crane rail beam under stochastic crane movements and irradiation conditions [1]. Jensen et al discussed the application of MC simulation in the reliability design of structural systems under stochastic excitation [2].…”