A new dynamic model of towing cables

Gomes, Sebastião Cícero Pinheiro

doi:10.1016/j.oceaneng.2020.107653

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…Wang studied the sharp turns, gradual turns and their transient states of towed cable dynamics for different course directions through the ratio of total length to turning radius R/L, the ratio of cable mass to vehicle mass and the ratio of mass unit length to hydrodynamic force w/r [6]. Another article proposes a new formalism for the dynamic modeling of a cable towing system, in which both the tugboat and the towed vessel are subject to forces from waves on the sea surface [7]. Tao conducted research on the design and control strategy of a streamer controller for the dynamic characteristics of streamers [8].…”

Section: Introductionmentioning

confidence: 99%

Study on the steady state position of ocean towing cables

Wang,

Wu,

Liang

2024

J. Phys.: Conf. Ser.

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A study is conducted on the static equilibrium posture of the towing cable in water under a constant speed state in the towing system. Firstly, the underwater force state of the towing body is calculated and then the posture and tension of the towing cable are analyzed and calculated. As the cable is divided into two states which are above water and below water, a differential equation system is established as the boundary. The initial value of the equation can be transformed by the drag and gravity values of the towing body. The program solves the differential equations using the fourth-order Runge Kutta method and draws the attitude curve. Finally, it verifies the theoretical calculation results through experiments.

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Section: Introductionmentioning

confidence: 99%

Study on the steady state position of ocean towing cables

Wang,

Wu,

Liang

2024

J. Phys.: Conf. Ser.

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“…By using the central difference method and Newton iteration method, the motion governing equations are discribed and solved iteratively in time and space, and the dynamic characteristics of the drag line array are obtained. Samuel da Silva Gomes et al [4] proposed a new dynamic modeling form for the cable towing system in which both the tugboat and the tugboat are affected by the sea wave force, and also proposed an algorithm program to determine the dynamic tension of the cable. The simulation results show that the dynamic response conforms to the physical expectation.…”

Section: Introductionmentioning

confidence: 99%

“…After training, the model can accurately and quickly reproduce the mooring cable tension. Yuliang Zhao et al [8] proposed a hybrid BPNN-FEM method based on modified BP neural network and FEM, which can easily predict the statistical preload and dynamic preload sequence of multi-design variable mooring system under irregular sea conditions. It has been proved that the prediction results are in good agreement with the finite element calculation results.…”

Section: Introductionmentioning

confidence: 99%

Prediction of underwater towing cable tension based on LSTM neural network

Zhang,

Dong,

Zhang

et al. 2023

Fourth International Conference on Artificial Intelligence and Electromechanical Automation (AIEA 2023)

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Aiming at the problems that the tension of underwater towing cable is not easy to monitor and the calculation time of the time domain coupling analysis process of towing cable is long, a tension early warning system of underwater towing cable based on long short-term memory (LSTM) neural network is designed. This paper considers the influence of single time variable and multiple variables (six degrees of freedom of tugboat) respectively. The tension time series of the key nodes of the towing cable are predicted and analyzed, and the predicted results are compared with the tension data obtained based on OrcaFlex numerical simulation to verify the accuracy of the prediction. Meanwhile, the predicted results are compared with the back propagation (BP) model and the kernel extreme learning machine (KEML) model. The experimental results show that the prediction accuracy based on LSTM neural network has obvious advantages, the maximum determination coefficient R2 is 0.8787, and the minimum root mean square error is 4.9082, which can achieve the effect of tension prediction, and has certain significance for the early warning of underwater towing cable tension.

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“…The dynamic system composed of flexible cable components is a common type of nonlinear dynamic system of flexible bodies, which has a wide range of applications in aerospace [1][2][3], communication [4,5] and transmission lines [6]. The nonlinear dynamic phenomena exhibited by flexible cable components, especially the highrise structures, and the possible damage they may cause are important issues in current dynamics research [7].…”

Section: Introductionmentioning

confidence: 99%

The study and application of space-time absolute nodal coordinate formulation quadrilateral cable element

Chen

Wang

Liu

et al. 2023

Preprint

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The construction of high-order shape function is a key and difficulty for unstructured grid mesh and sliding boundary problem. In this paper, a construction method of space-time absolute nodal coordinate formulation quadrilateral cable (SACQ) is proposed and the accuracy of SACQ element is studied and verified with 3 different applications. First, the shape function of SACQ is constructed with spatiotemporal reduction coordinate and the action integral of SACQ is composed with Lagrangian function and discrete with perspective transformation. second, numerical convergence region is discussed and determined with Courant number. Furthermore, a space-time nodal dislocation and its relation with Courant number is studied. The simulation and verification are focusing on some realistic problems. Finally, one-sided impact, free-flexible pendulum, taut string with sliding boundary and a deployable guyed mast under impact transverse wave are simulated. In these problems, unstructured grid meshed with SACQ has similar energy convergence and accuracy with structured grid but shows better efficiency.

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A new dynamic model of towing cables

Cited by 13 publications

References 20 publications

Study on the steady state position of ocean towing cables

Study on the steady state position of ocean towing cables

Prediction of underwater towing cable tension based on LSTM neural network

The study and application of space-time absolute nodal coordinate formulation quadrilateral cable element

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