Determination of buckling loads of conical shells using extrapolation techniques

Buckling Assessment of Imperfect Cylindrical Shells Under Axial Loads Using a Gep Technique

“…They continued the research of Tadeusiewicz et al, who employed back-propagation neural networks (BPNNs) to determine the buckling load of cylindrical shells under axial compression [8]. Most recently, Ghanbari Ghazijahani and Zirakian investigated the critical buckling load of thin shells by implementing extrapolation techniques [5]. The efficiency of Southwell, Massey, Modified, and Meck plotting methods in investigating the buckling behavior of shell structures were confirmed in their study.…”

“…This evaluation was conducted to simultaneously obtain high R 2 and low RMSE and MAE values, which signify the most precise approximation. These criteria can be calculated based on equations (3)-(5): (5) where pi indicates the predicted values of the buckling load, n is the number of data and oi and i o denote the observed and average observed experimental output values of the buckling load, respectively. It was observed that the performance of the metaheuristic algorithms could not be assessed from the results of a single run due to the random nature of the computations.…”

“…On the other hand, the buckling analysis of such structures is considered a serious challenge, since the buckling load cannot be easily determined from the data analysis of experimental results [3,4]. Generally, shell structures exhibit significant initial geometric imperfections; hence, the determination of their buckling load has been reported to be approximate and imprecise [5]. Figure 1 illustrates the geometric features of a cylindrical shell structure with general geometric parameters.…”

Steel Structures: Brilliant Ideas, Advances and Discussions

“…As examples, Ghanbari Ghazijahani and Zirakian performed a study to utilize the data obtained from the experiments on conical shells subjected to the external pressure in order to find the critical buckling load by extrapolation techniques. This method has been established first for steel beams and columns and was applied to the shell structures [9] ( Figure 1). This set of data resulted in a very good agreement comparing experimental data with the results of the extrapolation methods.…”

Experiments on corrugated thin cylindrical shells under uniform external pressure

“…Moreover, Ghanbari Ghazijahani and Showkati (2013) also studied the buckling behavior of long unstiffened cylindrical steel shells under uniform peripheral pressure. Most recently, Ghanbari Ghazijahani and Zirakian (2014) showed the applicability of different extrapolation techniques in predicting the accurate critical buckling loads of thin-walled shell structures with various geometrical properties under external pressure.…”