Convergence of the method of successive approximations in geometrically nonlinear problems

1973 ◽  
Vol 9 (9) ◽  
pp. 1010-1015
Author(s):  
Ya. F. Kayuk
Keyword(s):  
Nonlinear Problems ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Geometrically Nonlinear

Numerical Methods for Solving Physically Nonlinear Problems for Inhomogeneous Thick-Walled Shells

2017 ◽  
Vol 865 ◽  
pp. 325-330 ◽  
Author(s):  
Vladimir I. Andreev ◽  
Lyudmila S. Polyakova
Keyword(s):  
Numerical Method ◽  
Nonlinear Problems ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Deformation Diagram ◽  
Method Of Solution ◽  
Properties Of Materials ◽  
Physical Fields ◽  
Cylinders And Spheres ◽  
Numerical Method Of Solution

The paper proposes the numerical method of solution the problems of calculation the stress state in thick-walled cylinders and spheres from physically nonlinear inhomogeneous material. The urgency of solved problem due to the change of mechanical properties of materials under the influence of different physical fields (temperature, humidity, radiation, etc.). The deformation diagram describes the three-parameter formula. The numerical method used the method of successive approximations. The results of numerical calculation are compared with the test analytical solutions obtaining the authors with some restrictions on diagram parameters. The obtained results can be considered quite satisfactory.

Geometrically nonlinear calculation of trailing rod designs. Part 2. Matrix calculation of trailing systems

10.12737/336 ◽  
2013 ◽  
Vol 1 (1) ◽  
pp. 18-27 ◽  
Author(s):  
Андрей Свентиков
Keyword(s):  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Geometrically Nonlinear ◽  
Matrix Algorithms ◽  
Nonlinear Matrix ◽  
Matrix Calculation ◽  
Good Agreement

Is treated geometrically nonlinear matrix calculation of core construction with the use of flexible threads. The second part of the article is devoted to the study of matrix algorithms nonlinear calculation of hanging systems. For the geometrically nonlinear calculation was applied the method of elastic solutions, and for the constructive nonlinear basis of the method of successive approximations. The proposed methods have been tested on the well-known plane examples of the calculation, as well as on the example of study of the spatial hanging rod cover. The results found on the proposed methods have shown good agreement with the corresponding data of other authors. Also it is established that the greatest imbalance nodes in the cantilevered system is observed in the nodes of a fle­xible bearing thread, as well as in the nodes of the greatest intensity of the load.

scholarly journals NUMERICAL ALGORITHM FOR SOLVING THE CONTINUATION PROBLEM FOR THE ACOUSTIC EQUATION

2020 ◽  
Vol 70 (2) ◽  
pp. 7-13
Author(s):  
J.A. Askerbekova ◽  
Keyword(s):  
Inverse Problem ◽  
Convergence Rate ◽  
Direct Problem ◽  
Natural Extension ◽  
Nonlinear Problems ◽  
Initial Boundary ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Optimal Convergence Rate ◽  
Optimal Convergence

In this paper we consider the initial-boundary value problem for the acoustics equation in the temporal-triangular domain. We reduce the original ill-posed problem to an equivalent inverse problem with respect to some direct problem. This direct problem is well-posed. The inverse problem is replaced by a minimization problem. An algorithm for solving the inverse problem by the Landweber iteration method is constructed. We apply the method of successive approximations to the equation, we obtain a natural extension to nonlinear problems. This method leads to optimal convergence rate in certain cases. An analysis of the iterative Landweber method for nonlinear problems depends on the source conditions and additional conditions. Convergence analysis and error estimates are usually made with many assumptions, which are very difficult to verify from a practical point of view. This method leads to optimal convergence rate under certain conditions. Theoretical analysis is confirmed by numerical results. Visual examples are processed numerically.

scholarly journals Frictional Heating During Sliding of two Semi-Spaces with Arbitrary Thermal Nonlinearity

2014 ◽  
Vol 8 (4) ◽  
pp. 204-208 ◽  
Author(s):  
Ewa Och
Keyword(s):  
Thermal Conductivity ◽  
Frictional Heating ◽  
Thermal Contact ◽  
Nonlinear Problems ◽  
Initial Boundary ◽  
Linearization Method ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Coefficient Of Thermal Conductivity ◽  
Kirchhoff Transformation

Abstract Analytical and numerical solution for transient thermal problems of friction were presented for semi limited bodies made from thermosensitive materials in which coefficient of thermal conductivity and specific heat arbitrarily depend on the temperature (materials with arbitrary non-linearity). With the constant power of friction assumption and imperfect thermal contact linearization of nonlinear problems formulated initial-boundary thermal conductivity, using Kirchhoff transformation is partial. In order to complete linearization, method of successive approximations was used. On the basis of obtained solutions a numerical analysis of two friction systems in which one element is constant (cermet FMC-845) and another is variable (grey iron ChNMKh or aluminum-based composite alloy AL MMC) was conducted

scholarly journals Analytical Method for Geometric Nonlinear Problems Based on Offshore Derricks

Mathematics ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 610
Author(s):  
Chunbao Li ◽  
Hui Cao ◽  
Mengxin Han ◽  
Pengju Qin ◽  
Xiaohui Liu
Keyword(s):  
Analytical Method ◽  
Bending Moment ◽  
Nonlinear Problems ◽  
Weather Conditions ◽  
Order Effect ◽  
Practical Calculation ◽  
Geometrically Nonlinear ◽  
Uniform Load ◽  
Safety Research ◽  
Calculation Results

The marine derrick sometimes operates under extreme weather conditions, especially wind; therefore, the buckling analysis of the components in the derrick is one of the critical contents of engineering safety research. This paper aimed to study the local stability of marine derrick and propose an analytical method for geometrically nonlinear problems. The rod in the derrick is simplified as a compression rod with simply supported ends, which is subjected to transverse uniform load. Considering the second-order effect, the differential equations were used to establish the deflection, rotation angle, and bending moment equations of the derrick rod under the lateral uniform load. This method was defined as a geometrically nonlinear analytical method. Moreover, the deflection deformation and stability of the derrick members were analyzed, and the practical calculation formula was obtained. The Ansys analysis results were compared with the calculation results in this paper.

On a sphere performing linear and torsional oscillations in a viscous fluid

1988 ◽  
Vol 66 (7) ◽  
pp. 576-579
Author(s):  
G. T. Karahalios ◽  
C. Sfetsos
Keyword(s):  
Boundary Layer ◽  
Viscous Fluid ◽  
Secondary Flow ◽  
Small Amplitude ◽  
Equations Of Motion ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Time Varying ◽  
Torsional Oscillations

A sphere executes small-amplitude linear and torsional oscillations in a fluid at rest. The equations of motion of the fluid are solved by the method of successive approximations. Outside the boundary layer, a steady secondary flow is induced in addition to the time-varying motion.

scholarly journals Green’s Function In Free Axisymmetric Vibration Analysis Of Annular Thin Plates With Different Boundary Conditions

2015 ◽  
Vol 20 (4) ◽  
pp. 939-951
Author(s):  
K.K. Żur
Keyword(s):  
Power Series ◽  
Vibration Analysis ◽  
Free Vibration Analysis ◽  
Thin Plates ◽  
Successive Approximations ◽  
Method Of Successive Approximations ◽  
Axisymmetric Vibration ◽  
Annular Plates ◽  
The Core ◽  
Analytical Frequency

Abstract Free vibration analysis of homogeneous and isotropic annular thin plates by using Green’s functions is considered. The formula of the influence function for uniform thin circular and annular plates is presented in closed-form. The limited independent solutions of differential Euler equation were expanded in the Neumann power series based on properties of integral equations. The analytical frequency equations as power series were obtained using the method of successive approximations. The natural axisymmetric frequencies for singularities when the core radius approaches zero are calculated. The results are compared with selected results presented in the literature.

Sign in / Sign up

Export Citation Format

Share Document