Vibration Measurements and Analysis for Equipment and Piping Systems of Nuclear Power Plants(&lt;Special Issue&gt;Earthquake and Aseismic Technology)

Kaga, Makio; Kasai, Hiroaki; Tanaka, Kihachiro; Takayanagi, Masayoshi; Uchiyama, Yuuichi

doi:10.1299/jsmemag.79.689_377

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“…We propose command user interface environment to generate bonding information on the interface of non-confirming meshes to produce multiple point constraints information with small deformation and sliding in this paper. For bonding strategy, penalty method or classical spring connection on the interface of components are evaluated by many researchers [2], however, for large scale analysis, iterative solver of large linear equations is an essential computational technology and the penalty method is claimed to deteriorate the convergence rate of iterative solver [3]. The sensitivity of penalty factor is also investigated in this paper for efficient computation of assembled structure.…”

Section: Introductionmentioning

confidence: 99%

Component-Wise Meshing Approach and Evaluation of Bonding Strategy on the Interface of Components for Assembled Finite Element Analysis of Structures

Yamada

Kushida

Araya

et al. 2010

KEM

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The finite elements are extensively utilized to solve various problems in engineering fields with the growth of computing technologies. However, there is a lack of methodology for analyses of huge assembled structures. The mechanics on the interface of each components, for instance, contact, bolt joint and welding in assembly is a key issue for important huge structure such as nuclear power plants. On the other hand, it is well known that as finite element models become large and complex, construction of detailed mesh becomes a bottleneck in the CAE procedures. To solve these problems, the authors would like to introduce component-wise meshing approach and bonding strategy on the interface of components. In order to assemble component-wise meshes, the penalty method is introduced not only to constrain the displacements, but also to introduce classical spring connection on the joint interface, although penalty method is claimed that it is not suitable for iterative solver. In this paper, the convergence performance of an iterative solver with penalty method is investigated and the detailed component-wise distributed computation scheme is described with numerical examples.

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Section: Introductionmentioning

confidence: 99%