Nonlinear Static And Dynamic Response Of Underwater' Cable Structures Using The Finite Element Method

1975 ◽  
Author(s):  
Ronald L. Webster
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
The Finite Element Method ◽  
Cable Structures ◽  
Nonlinear Static ◽  
Element Method

Dynamic Response of Packets of Blades by The Finite Element Method

1978 ◽  
Vol 100 (4) ◽  
pp. 660-666 ◽  
Author(s):  
A. L. Salama ◽  
M. Petyt
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Harmonic Excitation ◽  
Mass Ratio ◽  
The Finite Element Method ◽  
Periodic Loading ◽  
Engine Order ◽  
Partial Admission ◽  
Element Method

The finite element method is used to study the free vibration of packets of blades. A packet of six shrouded blades is analyzed, only the tangential vibrations being considered. Results are obtained to establish the effect of certain parameters such as stiffness ratio, mass ratio, the number of blades in the packet, the effect of rotation and the position of the lacing wires. The dynamic response of a packet to periodic loading is also studied. The cases of engine order harmonic excitation and partial admission of gas are considered with reference to a packet of six shrouded blades.

Transient Dynamic Response of Arbitrary Stiffened Shells by the Finite Element Method

1995 ◽  
Vol 117 (1) ◽  
pp. 11-16 ◽  
Author(s):  
G. Sinha ◽  
M. Mukhopadhyay
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Bridge Engineering ◽  
Stiffened Plates ◽  
The Finite Element Method ◽  
Stiffened Shells ◽  
Triangular Shell Element ◽  
Plates And Shells ◽  
Element Method

Stiffened plates and shells often find wide application in bridge engineering, aircraft, ship and allied industries owing to its high strength to weight ratios. They are often subjected to dynamic loading such as air blast loading, for which detailed dynamic analysis is required to study the structure under these conditions. In the present approach, the dynamic response of stiffened plates and shells has been investigated by the finite element method employing a high precision arbitrary-shaped triangular shell element in which stiffeners may lie in any arbitrary direction within the element. This provides greater flexibility in the mesh generation. The governing undamped equations of motion have been solved by Newmark’s method for direct time integration. The dynamic response of plates and shells with or without stiffeners, subjected to different kinds of load-history have been studied and results are compared with the published analytical results.

Characteristics Research of Aqueduct under FSI Dynamic Response

2013 ◽  
Vol 864-867 ◽  
pp. 2367-2370
Author(s):  
Feng Zhu ◽  
Ai Wu Cao ◽  
Geng Ying
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Response ◽  
Pressure Distribution ◽  
Hydrodynamic Pressure ◽  
The Finite Element Method ◽  
Height Range ◽  
The Difference ◽  
Pressure Changes ◽  
Element Method

Maximum distribution of hydrodynamic pressure on the flume sidewall were studied in this paper based on the finite element method. It contains the difference comparison of theoretical and numerical formulas, rules of maximum hydrodynamic pressure distribution under regular and irregular incentives, and hydrodynamic pressure changes with different height of bracket below the aqueduct. Studies show that: In the 30m height range, with the rise of bracket, the hydrodynamic pressure grows linearly.

COMPARISION AND STUDY OF NUMERICAL METHODS FOR DYNAMIC RESPONSE EVALUATION OF SDOF

2020 ◽  
Vol 43 (01) ◽  
Author(s):  
THAI PHUONG TRUC
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Methods ◽  
Dynamic Response ◽  
Field Analysis ◽  
Full Detail ◽  
The Finite Element Method ◽  
Senior Year ◽  
Acceleration Method ◽  
Element Method

Written for senior-year undergraduates and first-year graduate students with solid backgrounds in differential and integral calculus, this paper is oriented toward engineers and applied mathematicians. Consequently, this paper should be useful to senior-year undergraduates the finite element method [1]. The scaled direct approach is adopted for this purpose and each step in the finite element solution process is given in full detail. For this reason, all students must be exposed to (and indeed should master). This paper provides the general framework for the development of nearly all (nonstructural) finite element models. The finite element method of analysis is a very powerful, modern computational tool. Applications range from deformation and stress analysis of automotive, aircraft, building, and bridge structures to field analysis of beat flux, fluid flow, magnetic flux, seepage, and other flow problems. This paper presents study and comparison of numerical methods which are used for evaluation of dynamic response. A Single Degree of Freedom (SDF)-linear problem is solved by means of Newmark’s Average acceleration method [2], Linear acceleration method [2], Central Difference method [6,7] with the help of MATLAB. The advantages, disadvantages, relative precision and applicability of these numerical methods are discussed throughout the analysis.

Modellierung von Kabelstrukturen und deren Verhalten bei Kontakt und Torsion/Modeling of cable structures under contact and torsion

Bauingenieur ◽  
2015 ◽  
Vol 90 (05) ◽  
pp. 193-199
Author(s):  
Peter Wrigger ◽  
Alfredo Gay Neto ◽  
Paulo M. Pimenta
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
The Finite Element Method ◽  
Unilateral Constraints ◽  
Cable Structures ◽  
Finite Displacements ◽  
Irreparable Damage ◽  
Element Method

Die Verlegung von Kabel auf dem Meeresgrund kann nur durch Balkenmodelle erfasst werden, die es erlauben endliche Verschiebungen und Rotationen abzubilden. Dies führt auf nichtlineare Formulierungen, die nur noch mittels diskretisierender Verfahren, wie der Methode der finiten Elemente gelöst werden können. Hinzu kommen Zwangsbedingungen infolge des Kontaktes der Kabel mit dem Meeresgrund, was zu zusätzlichen Nichtlinearitäten führt. Unter Torsion kann der Kontakt sowohl mit dem Meeresgrund als auch als Selbstkontakt des Kabels auftreten. Letzteres führt bei einer Verlegung zu oft irreparablen Schäden.   Summary Laying of offshore cables on ocean ground can be described by beam models which allow for finite displacements and rotations. These models lead to nonlinear formulations that can only be solved by using approaches like the finite element method. Additional to the nonlinearities stemming from the cable unilateral constraints occur due to contact of the cable with the seabed which results in further nonlinearities. When torsion is applied to such structures then besides the contact with the seabed also self -contact of the cable can develop which may lead frequently to irreparable damage of the cable.

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