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Showing 1 to 20 of 31 for “"substructuring"”.
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Free Vibrational Analysis of Structural Systems Using the Method of Substructuring
Made available in DSpace on 2014-12-12T00:25:57Z (GMT). No. of bitstreams: 1 7511858.pdf: 1996437 bytes, checksum: f43fc26384a55a8ef69bca2b5780a102 (MD5) Previous issue date: 1974
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Population substructuring in Schreibers' long-fingered bat (Miniopterus schreibersii) in South Africa
Schreibers' long-fingered bat, Miniopterus schreibersi migrates seasonally between winter (hibernacula) and summer (maternity) colonies in South Africa. Previous behavioural studies suggested that roost fidelity is well developed in this species, and that juvenile dispersal may be limited, possibly …
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A Novel Method for Vibration Analysis of the Tire-Vehicle System via Frequency Based Substructuring
… which utilizes the principles of frequency based substructuring (FBS) to separate or combine frequency response data for the tire and suspension. This method allows for the possibility of combining high fidelity tire models with analytical or experimental suspension data in order to obtain an …
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Dynamic substructuring of complex hybrid systems based on time-integration, model reduction and model identification techniques
Hybrid Simulation with Dynamic Substructuring (HSDS) is a mixed numerical/- experimental simulation techniques. In detail, HSDS combines a Physical Substructure(PS) -the most critical subpart- with a Numerical Substructure (NS), and a compliant time integration process calculates the overall …
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Seismic risk mitigation of "special risk" process plants through enhanced concepts and subplant hybrid simulation
… online hybrid (numerical/physical) dynamic substructuring simulations have shown their potential in enabling realistic dynamic analysis of almost any type of nonlinear structural system. At the same time, owing to faster and more accurate testing equipment, a number of different offline …
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Determinação das características dinâmicas das estruturas através de subestruturação e redução de graus de liberdade
The present thesis deals with substructuring in dynamic analysis of structures. Two methods for reducing degrees of freedom are presented: Guyan method and Craig & Bampton method. Example problems of plane frame structures are presented to illustrate and to compare the accuracy of theses methods. …
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Domain Decomposition Preconditioners for Hermite Collocation Problems
… for very large linear systems of equations. Substructuring provides a framework for constructing robust and parallel preconditioners for linear systems arising from the discretization of boundary value problems. Although collocation is a very general and effective discretization technique for …
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Fast Solvers for Models of Fluid Flow with Spectral Elements
… equations. The method is based on iterative substructuring where fast diagonalization is used to efficiently eliminate the interior degrees of freedom and subsidiary subdomain solves. We demonstrate the effectiveness of this preconditioner in numerical simulations using a spectral element …
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Residual flexibility methods for decoupled analysis of integrated structural systems
… cost and logistics issues. Traditional substructuring methods effectively reduce system size through truncation of component modes, but still require an eigen-value analysis of the integrated system. A new method is discussed which utilizes residual flexibility to more accurately …
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An Innovative Coupling Scheme of FEM And BEM Solvers
… time domain. The proposed method is based on substructuring concepts but adopts an explicit enforcement of displacement compatibility and force equilibrium at the interface boundary among the systems in an innovative and efficient manner. The master solver operates at a time step independent …
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Boundary method-based domain decomposition on multiprocessors
… the Schwarz alternating method or the iterative substructuring method, where the interface values are usually solved by Preconditioned Conjugate Gradient iteration which requires subdomain solvers for all subdomains at each step, in the BMDD approach the interface values are evaluated after an …
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Assessing the effects of subpopulations on the application of forensic DNA profiling.
… factors to take into account issues such as substructuring of populations and sampling inefficiencies. It has been shown previously that regional genetic variation within the UK ‘Caucasian’ population is negligible but consideration has to be made for profiles which may originate from an …
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Structural performance evaluation and optimization through cyber-physical systems using substructure real-time hybrid simulation
… on the development and validation of the dynamic substructuring RTHS technique using shake tables, novel techniques in increasing RTHS stability by introducing artificial damping to an under-actuated physical specimen, and the optimal design of the structure or supplemental control devices for …
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Development of Hybrid Fire Simulation Methods and Their Applications to Column Fire Tests
… full-scale column tests. The simulation schemes, substructuring methods, and stability issues are discussed in detail in this thesis. A steel moment frame was selected as a reference structure for the validation tests. The proposed methods were applied for parametric studies of steel columns and …
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Static and Dynamic Response of Elastic Skeletal Structures using an Enhanced Beam Element
… type of analysis are determined using a form of substructuring which involves the condensation of the extra degrees of freedom generated from the use of the new element. The associated eigenvectors are computed using a random generation techniques for which a new computer program has been …
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Structure-acoustic analysis; finite element modelling and reduction methods
… methods are investigated and developed, using substructuring and modal reduction, for the analysis of structure-acoustic problems. The geometric problem domain is divided into a number of subdomains and a reduced set of basis vectors is derived for each of these subdomains. The set of basis …
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Isozyme variation within the Fraser fir population on Mt. Rogers, Virginia
… Gregorius' "𝜹" index all indicated little or no substructuring of the population. It is suggested that a population bottleneck (a drastic reduction of population numbers), which may have occurred following the last glaciation, is the cause for the relatively low genetic diversity found in the …
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The Use of Simulation to Expedite Experimental Investigations of the Effect of High-Performance Shock Absorbers
… develops a novel method that applies dynamic substructuring and system identification to generate a mathematical model that predicts the results of future tests as both command inputs and components are changed. This method is used to predict the results of 8-post rig tests as actuator …
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The Molecular Systematics of the Side-blotched Lizards (IGUANIA: PHRYNOSOMATIDAE: UTA)
… of a cryptic species boundary. This deep substructuring is compared with the many geographically concordant haploclades nested higher in the tree. In addition, a number of insular populations are placed in a basal position with respect to their potential mainland source populations. This …
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Two-step Component Mode Synthesis with convergence for the eigensolution of large-degree-of-freedom systems
Component Mode Synthesis (CMS) is a dynamic substructuring technique for the approximate eigensolution of large-degree-of-freedom (dof) systems divisible into two or more components. System synthesis using component modes results in approximate eigenparameters; in general, using more component …
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