Impact forces of submarine landslides on suspended pipelines considering the low-temperature environment

Effect of pipeline surface roughness on peak impact forces caused by hydrodynamic submarine mudflow

“…The simulation adopts the transient mode with a total time of 1 s and a time step of 0.001 s; the 8 solution mode is high resolution and second order backward Euler; the convergence scheme is the root mean square (RMS = 0.00005); specific settings are shown as Nian et al [6], Guo et al [23,28]. This numerical modelling has been verified many times by the author.…”

“…At present, there are many numerical modelling to simulate the interaction between submarine landslides and pipelines, such as the CFD method [5,6,9,19,21,22,23,26,27], the large deformation finite element (LDFE) method [24], the material point method (MPM) [5], the coupled Eulerian-Lagrangian (CEL) [34], the particle finite element method [25], etc. Based on the CFD theory, Zakeri et al [20] effectively reproduced the flume experiment [15] and obtained excellent simulation effect and accurate quantitative parameters.…”

“…As a highly destructive and sporadic load, submarine landslides, debris flows and mudflows, which are characterized by hydrodynamics, have caused great damage to submarine pipelines [1][2][3][4]; hence, these have become a research focus in recent years [5][6][7][8][9][10][11]. In terms of physical simulation, based on 1g single-phase (anhydrous environment) particle flow experiments [12][13][14], 1g flume experiment [15][16], rotating flume experiment [17] and Ng centrifugal model experiments [18], the researches on the interaction between submarine landslides and pipeline were carried out, the related laws were deeply explored, and reliable methods for assessing impact forces under simple working conditions were established.…”

“…However, due to the shortcomings of physical simulation, such as substantial manpower and material input, limited conditions and insufficient acquisition parameters, numerical simulation has become the main approach for current researches. In terms of numerical simulation, many important factors have been discussed, such as the soil property and composition of the landslide body [6,19]; the in-place state of the pipeline, including suspension [9,20,21], laid-on-seabed [22][23], buried [5,24,25], span height [23]; the angle of landslides impact on pipelines [19,26,27]; the pipeline type, including streamlined [22], honeycomb-hole [28] and seafloor low-temperature environment [6].…”

Σεισμική Τρωτότητα Και Βέλτιστη Αντιμετώπιση Της Σεισμικής Διακινδύνευσης Υποθαλάσσιων Και Παράκτιων Ενεργειακών Δικτύων

“…Η απόκριση επιφανειακών υποθαλάσσιων αγωγών υπό κινηματική καταπόνηση λόγω κατολίσθησης έχει διερευνηθεί από μία σειρά ερευνητές μέσω αναλυτικών προσομοιωμάτων (Chatzidakis et al, 2019;Parker et al, 2008;Randolph et al, 2010;Yuan et al, 2015;Yuan, Wang, Guo, & Shi, 2012), αλλά και αριθμητικών προσομοιωμάτων (Guo et al, 2022;P. F. Liu et al, 2010;Nian et al, 2018;Qian & Das, 2019). Αντίστοιχες μελέτες έχουν γίνει και με ημι-αναλυτικά προσομοιώματα (Chatzidakis et al, 2020;L.…”