scholarly journals Numerical modelling of the interaction between severe slugging and dynamic response of deepwater risers: A time-domain ANHE-FD based solution

2021 ◽  
pp. 103834
Author(s):  
Mac Darlington Uche Onuoha ◽  
Menglan Duan ◽  
Xiangmin Xu ◽  
Jianjun Liu
Keyword(s):  
Numerical Modelling ◽  
Dynamic Response ◽  
Time Domain ◽  
Deepwater Risers

scholarly journals Sensitivity with Respect to the Path Parameters and Nonlinear Stiffness of Vibration Transfer Path Systems

2010 ◽  
Vol 2010 ◽  
pp. 1-11
Author(s):  
Yimin Zhang ◽  
Xianzhen Huang
Keyword(s):  
Dynamic Response ◽  
Time Domain ◽  
Evaluation Criteria ◽  
Nonlinear Stiffness ◽  
Vibration System ◽  
Transfer Path ◽  
Dynamic Sensitivity ◽  
The Time Domain

Generally speaking, a vibration system consists of three parts: vibration resource, vibration transfer path, and vibration receiver. Based on the dynamic sensitivity technique, this paper proposes a method for evaluating the contribution of each vibration transfer path to the dynamic response of the vibration receiver. Nonlinear stiffness is an important factor in causing the nonlinearity of vibration systems. Taking sensitivity as the evaluation criteria, we present an effective approach for estimating the influence of nonlinear stiffness in vibration transfer paths on the dynamic response of the vibration receiver. Using the proposed method, the sensitivity of the vibration system with multiple and/or multidimensional transfer paths could be determined in the time domain.

scholarly journals Dynamic Response of a Road Bridge Subjected to Passing a Heavy Vehicle over a Standard Irregularity - Numerical Modelling and Experimental Testing

2022 ◽  
Vol 24 (1) ◽  
pp. D37-D45
Author(s):  
Milan Moravčík
Keyword(s):  
Numerical Modelling ◽  
Dynamic Response ◽  
Numerical Simulations ◽  
Experimental Testing ◽  
Heavy Vehicle ◽  
Dynamic Effects ◽  
Actual Problem ◽  
Box Girder ◽  
Dynamic Excitation ◽  
Girder Bridge

The paper presents an analysis of an actual problem related to dynamic effects to road bridges due to travelling a heavy vehicle over the bridge. Numerical simulations of the dynamic response are applied on a fictitious simple beam of the length Lb = 52 m with an artificial irregularity at midspan, corresponding to a characteristic span L (b5) = 52 m of the ten-span continuous box girder bridge. A heavy four-axle truck m v = 32 t is used for dynamic excitation, travelling over the bridge at passing speed of 70km / h. The obtained results are compared to results of the experimentally tested ten-span continuous pre-stressed reinforced concrete girder bridge at the same speed.

scholarly journals The dynamic response of prone-to-fall columns to ambient vibrations: comparison between measurements and numerical modelling

2016 ◽  
Vol 208 (2) ◽  
pp. 1058-1076 ◽  
Author(s):  
J. Valentin ◽  
A. Capron ◽  
D. Jongmans ◽  
L. Baillet ◽  
P. Bottelin ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Dynamic Response ◽  
Ambient Vibrations

scholarly journals Dynamic Analysis of Partially Embedded Structures Considering Soil-Structure Interaction in Time Domain

2011 ◽  
Vol 2011 ◽  
pp. 1-23 ◽  
Author(s):  
Sanaz Mahmoudpour ◽  
Reza Attarnejad ◽  
Cambyse Behnia
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Time Domain ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Structure System ◽  
Structure Interaction ◽  
Scaled Boundary Finite Element ◽  
Element Method

Analysis and design of structures subjected to arbitrary dynamic loadings especially earthquakes have been studied during past decades. In practice, the effects of soil-structure interaction on the dynamic response of structures are usually neglected. In this study, the effect of soil-structure interaction on the dynamic response of structures has been examined. The substructure method using dynamic stiffness of soil is used to analyze soil-structure system. A coupled model based on finite element method and scaled boundary finite element method is applied. Finite element method is used to analyze the structure, and scaled boundary finite element method is applied in the analysis of unbounded soil region. Due to analytical solution in the radial direction, the radiation condition is satisfied exactly. The material behavior of soil and structure is assumed to be linear. The soil region is considered as a homogeneous half-space. The analysis is performed in time domain. A computer program is prepared to analyze the soil-structure system. Comparing the results with those in literature shows the exactness and competency of the proposed method.

scholarly journals Numerical Modelling of Poroviscoelastic Grounds in the Time Domain Using a Parallel Approach

2006 ◽  
pp. 50-57 ◽  
Author(s):  
Arnaud Mesgouez ◽  
Gaëlle Lefeuve-Mesgouez ◽  
André Chambarel ◽  
Dominique Fougère
Keyword(s):  
Numerical Modelling ◽  
Time Domain ◽  
The Time Domain

Mooring Analysis of a Turret Moored FPSO in a Squall Environment

2015 ◽  
Author(s):  
Robert Oberlies ◽  
Amitava Guha ◽  
Scott Slocum
Keyword(s):  
Dynamic Response ◽  
Time Domain ◽  
Sensitivity Study ◽  
West African ◽  
Load Case ◽  
The West ◽  
Worst Case ◽  
Input Parameters ◽  
Computationally Intensive ◽  
Transient Dynamic Response

The transient dynamic response of a FPSO in a squall environment is dependent on several input parameters. Because the response’s dependence on these input parameters is unclear prior to performing the analysis, a large number of parameter combinations need to be considered to find the combination that gives a worst-case load or response as required by reference [1]. Because the required time-domain simulations are computationally intensive, there is often a practical need to limit the number of simulations that are performed, raising questions about how many are necessary to meet the analysis objectives. This study investigates the effect of different squall scenarios on a turret moored FPSO in the West African offshore environment. A large number of cases with selected vessel headings, squall types, squall approach directions and vessel drafts are studied and parameters affecting the critical mooring loads and turret positions are identified. Possible reductions in the load case matrix along with a sensitivity study of a few parameters affecting the results are also discussed.

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