Optimization Design of a Riser-Drill String Coupling System Based on CAE Techniques

Qin, Shiyao; Wang, Ruiming; Fu, Deyi; Wang, Gaowei

doi:10.1155/2021/6659632

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…What's more, NCGA algorithm shows more advantages over NSGA-II algorithm once the objective function has multiple peaks or the number of design variables is very large. 28 On account of the above discussion, NSGA-II algorithm and NCGA algorithm are intended to be adopted in this paper to conduct the optimization of the designed structure for the purpose of obtaining two suboptimal optimization results and the results will be further compared to determine the overall optimal solution.…”

Section: Conduction Of Optimization Modelmentioning

confidence: 99%

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Optimal design of a novel crash box with functional gradient negative Poisson’s ratio structure

Guan

Yan

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Crashworthiness and anti-vibration performance play critical roles in the performance of passenger cars. Aiming at enhancing the crash resistance and vibration resistance of vehicles thus providing good protection for passengers and drivers, a novel crash box with three-dimensional double arrow type negative Poisson’s ratio structure with functional gradient filling inner core (FGNPR crash box) is introduced in this paper and its performance is studied in detail through the comparison with the conventional crash box and the crash box filled with the uniform gradient negative Poisson’s ratio structure (NPR crash box) in crashworthiness and vibration resistance. Furthermore, range analysis is used to screen out the design variables that have little influence on the evaluation indexes and eliminate them. Based on these, neighborhood cultivation genetic algorithm (NCGA) and non-dominated sorting genetic algorithm-ii (NSGA-II) are selected as the optimization algorithms to carry out optimization design respectively and a comparison is made between the two suboptimal results screened out based on the normal boundary intersection (NBI) method to determine the overall optimal solution. Results show that the optimized FGNPR crash box has better crashworthiness and vibration resistance over the other crash boxes and its performance is further verified based on the peak acceleration of B-pillar in full vehicle crash condition. This paper provides some theoretical reference support for the development and exploration of automobile crash box systems.

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Section: Conduction Of Optimization Modelmentioning

confidence: 99%

“…What’s more, NCGA algorithm shows more advantages over NSGA-II algorithm once the objective function has multiple peaks or the number of design variables is very large. 28…”

Section: Optimization Design Of Fgnpr Crash Boxmentioning

confidence: 99%

Optimal design of a novel crash box with functional gradient negative Poisson’s ratio structure

Guan

Yan

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…In the field of offshore engineering, some scholars have begun to incorporate factors such as drill string rotation and collisions in the hydrodynamic response of the riser [22][23][24]. MAJOR et al [25] discovered that drill string rotation decreases the natural frequency and increases the vibration amplitude of the free vibration response of the drilling riser.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear coupled motions of a pipe-in-pipe system experiencing vortex-induced vibrations

Hou,

Long,

Meng

et al. 2024

Nonlinear Dyn

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This paper delves into the dynamics of the pipe-in-pipe system, crucial in offshore oil and gas exploration, featuring an inner drill string nestled within an outer riser. A reduced-order model with five degrees of freedom is proposed to capture the coupled dynamics of this system. Here, the inner drill string is depicted as a torsional-lateral coupled rotor constrained by the outer riser. In contrast, the outer riser is modeled as a suspended stator subjected to vortex-induced excitations and contact forces. The model incorporates nonlinearities, including dry frictions, collisions, loss of contact, and nonlinear damping through the van der Pol wake oscillator. This comprehensive model allows an indepth exploration of the dynamics of the coupled pipein-pipe system. Parametric analysis is conducted based on the non-dimensional numerical model, revealing a novel and stable whirling phenomenon termed "follower whirling" at low rotary speeds of the drill string. During this stable follower whirling, the riser's vortex-induced vibration traces an "8"-shaped trajectory, while the

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“…Moreover, there has been extensive research conducted on the nonlinear dynamics response of marine risers in the absence of internal flow, highlighting its paramount importance in understanding their complex behavior to ensure safe and reliable operation of the riser system [21][22][23][24]. Through the exploration of the nonlinear dynamics of marine risers, engineers and researchers can greatly advance innovative solutions aimed at enhancing their resilience, efficiency, and longevity in offshore environments [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Influence of Pulsating Internal Fluid Flow on the Nonlinear Dynamics of Marine Risers

Alfosail,

Cunha,

Zhao

et al. 2023

Preprint

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In this work, we explore the dynamics of inclined marine risers subjected to pulsating internal fluid flow. The presence of geometric nonlinearities with static deflection makes the response of the inclined riser different from conventional top tension risers when subjected to pulsating flows. At first, the riser model is solved via the Galerkin method, and the results are compared and validated using perturbation analysis. Then, the response of the riser is studied under various parameters and pulsating flow frequencies. The excitation of the riser under pulsating flow fluctuations causes the riser to vibrate at primary and secondary parametric resonances simultaneously. In addition, the multifrequency parametric excitations interact with the inherit competing nonlinearities causing the response of the riser to exhibit a multi-state solution which is further analyzed via statistical analysis to examine the probability of the basin of attraction. The response of the riser reveals rich and complex nonlinear dynamics features such as quasiperiodic and chaotic behaviors.

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Optimization Design of a Riser-Drill String Coupling System Based on CAE Techniques

Cited by 5 publications

References 11 publications

Optimal design of a novel crash box with functional gradient negative Poisson’s ratio structure

Optimal design of a novel crash box with functional gradient negative Poisson’s ratio structure

Nonlinear coupled motions of a pipe-in-pipe system experiencing vortex-induced vibrations

Influence of Pulsating Internal Fluid Flow on the Nonlinear Dynamics of Marine Risers

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