Journal ArticleDOI
Computational efficiency of meshfree methods with local-coordinates algorithm
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TLDR
In this paper, a mesh-free method with uniform nodal distribution and local coordinates shape function was proposed to reduce the computational time dependency on the number of nodes by 36% and reduce the complexity of analysis of problems requiring very fine nodal distributions.Abstract:
In this study, meshfree methods with uniform nodal distribution and local-coordinates shape functions are investigated. The proposed meshfree method can be used with various shape functions and is tested on a test patch with a Laplace governing equation and both essential and Neumann boundary conditions. It is shown to reduce the computational time dependency on the number of nodes by 36%. This reduction of dependency is significant as it reduces the computational time by several orders for analysis of problems requiring very fine nodal distribution. The meshfree method with uniform nodal distribution and local coordinates shape function reduces and converges to the perfectly uniform nodal distribution with finer nodal distributions. The technique is illustrated on a rectangular Kirchhoff-Love plate to show the practical use of the technique for allowing higher order shape function and finer nodal distribution to be used with multiple overlapping boundary conditions as well as on an electromagnetic problem to explain the uses of this technique on solving multiple similar problem cases with slight changes in geometry of boundary nodes. Overall, the present methodology provides a simple way to increase the computational efficiency of meshfree methods in range of an order while retaining many of its benefits.read more
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DissertationDOI
Mechanism of an arched basilar membrane in mammalian cochlea
TL;DR: In this paper, the authors analyzed the mechanism of an arched basilar membrane in contributing to the sharp frequency tuning in a gerbil cochlea and compared it with the bandwidth of human cochlear auditory nerve fiber.
Journal ArticleDOI
An Improved Finite Cloud Method With Uniformly Distributed Clouds and Enhanced Boundary Conditions
Miewleng Oh,See Pheng Hang +1 more
TL;DR: In this article , an improved FCM is proposed such that a node of interest is approximated with its nearest cloud, which enables a set of uniformly distributed clouds of various densities such that all the information in the problem domain is captured and stored in the clouds.
References
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Element‐free Galerkin methods
Ted Belytschko,Y. Y. Lu,L. Gu +2 more
TL;DR: In this article, an element-free Galerkin method which is applicable to arbitrary shapes but requires only nodal data is applied to elasticity and heat conduction problems, where moving least-squares interpolants are used to construct the trial and test functions for the variational principle.
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The partition of unity finite element method: Basic theory and applications
Jens Markus Melenk,Ivo Babuška +1 more
TL;DR: In this article, the basic ideas and the mathematical foundation of the partition of unity finite element method (PUFEM) are presented and a detailed and illustrative analysis is given for a one-dimensional model problem.
Journal ArticleDOI
Reproducing kernel particle methods
TL;DR: A new continuous reproducing kernel interpolation function which explores the attractive features of the flexible time-frequency and space-wave number localization of a window function is developed and is called the reproducingkernel particle method (RKPM).
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Surfaces generated by moving least squares methods
Peter Lancaster,K. Salkauskas +1 more
TL;DR: In this article, an analysis of moving least squares (m.l.s.) methods for smoothing and interpolating scattered data is presented, in particular theorems concerning the smoothness of interpolants and the description of m. l.s. processes as projection methods.
Journal ArticleDOI
The Partition of Unity Method
Ivo Babuška,Jens Markus Melenk +1 more
TL;DR: In this article, a new finite element method is presented that features the ability to include in the finite element space knowledge about the partial differential equation being solved, which can therefore be more efficient than the usual finite element methods.
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