Finite element modeling for stress analysis
finite element methods for structural_engineers pdf
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Báo cáo khoa học: "A Cascaded Finite-State Parser for Syntactic Analysis of Swedish" potx
... parser partly depends on the output of the tagger and the rest of the preprocessing software Our way of dealing with how "correct" the performance of the parser is, follows a practical, pragmatic ... this information as well as grammatical functions in the output A corpus, annotated syntactically, is a rich source of information which we intend to use for a number of applications, e.g information ... the implementation of a large coverage parser for Swedish, following the cascaded finite-state approach Our main guidance towards the grammar development was the observation of how and which function...
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CHL - A Finite Element Scheme for Shock Capturing_1 pdf
... Version - http://www.simpopdf.com Waterways Experiment Station Cataloging-in-Publication Data Berger, Rutherford C A finite element scheme for shock capturing / by R.C Berger, Jr., ; prepared for Assistant ... supercritical channel transitions and preserve the Rankine-Hugoniot conditions For simple geometries, analytic and flume results are compared with approaches for shock- capturing and shock detection A ... is applicable outside the field of hydraulics as well to complex aerodynamic tlow fields containing shocks Basic Equations The basic equations that are addressed are the 2-D shallow-water equations...
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CHL - A Finite Element Scheme for Shock Capturing_3 doc
... data The comparisons are made to the water surface heights and timing of the shock passage The final case is a steady-state comparison to flume data reported in Ippen and Dawson (1951) Here a ... flume data, for which discrepancy will be due to the hydrostatic assumption made in the shallowwater equations Instead we have a direct way of evaluating the numerical scheme alone As spatial and ... shallow-water equations in 1-D in Berger and Winant (1991) and for 2-D in Berger (1992) A 1-D St Venant application is given by Hicks and Steffler (1992) If we analyze this approach on a uniform...
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CHL - A Finite Element Scheme for Shock Capturing_4 pdf
... breach The basic element length in the channel is 0.1 m and there are five elements across the channel width For the smooth channel case, Bell, Elliot, and Chaudhry (1992) used a 1-D calculation ... arrival is late by about 0.2 and 0.15 sec at stations and 8, respectively The flume at stations and has a earlier arrival time for the outer wave connpared to the inner wave The numerical model does ... wall is designated by squares and the outside by diamonds Of particular importance is the arrival time of the shock front At station the numerical prediction of arrival time using of 1.0 is about...
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CHL - A Finite Element Scheme for Shock Capturing_5 potx
... indicates nondimensional quantities and o as a subscript indicates a constant, and These equations can be diagonalized by defining a new variable such that P : A ~ P , where Chapter Testing = A, ... Now let's study the behavior of the 1-D linearized shallow-water equation analytically and numerically This could lead to a conceptual appreciation of the behavior we have observed in the testing ... indicates the time-step and the subscript j is the spatial node location We now present the results of this analysis for a = 112 and for the temporal derivative parameter at of 1.0 and 1.5 We shall...
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CHL - A Finite Element Scheme for Shock Capturing_6 potx
... comparison of the predicted jump speed and magnitude with nalytic and flume results A comparison is also made to a flume case of steady-state supercritical lateral 1SN 754 0-0 1-2 8 0-5 500 Standard Form ... Leendertse, J J (1967) "Aspects of a computational model for long-period water-wave propagation," Memorandum RM 5294-PR, Rand Corporation, Santa Monica, CA Moretti, G (1979) "The A- scheme, " Computers ... 3918 0-6 199 Form Approved OMB NO 070 4-0 188 I Technical Report HL-9 3-1 2 sistant Secretary of the Army (R&D) shington, DC 20315 I" vailable from National Technical Information Service, 5285 Port Royal...
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A Finite Element Scheme for Shock Capturing ppt
... which can detect shocks and increase a automatically The method we employ detects energy variation for each element and flags those elements which have a high variation as needing a larger value ... Waterways Experiment Station Cataloging-in-Publication Data Berger, Rutherford C A finite element scheme for shock capturing / by R.C Berger, Jr., ; prepared for Assistant Secretary of the Army ... Values of C, less than appear to lag the analytic shock and Cs greater than leads the analytic shock With the largest C, the calculated shock speed is greater than the analytic by at most 0.0034 mlsec...
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A Finite Element Scheme for Shock Capturing Part 1 potx
... HL-93 -12 August 19 93 Waterways Experiment Station Cataloging-in-Publication Data Berger, Rutherford C A finite element scheme for shock capturing / by R.C Berger, Jr., ; prepared for Assistant ... In-House Laboratory Independent Research Program A Finite Element Scheme for Shock Capturing by R C Berger, Jr Hydraulics Laboratory U.S Army Corps of Engineers Waterways Experiment Station 3909 Halls ... supercritical channel transitions and preserve the Rankine-Hugoniot conditions For simple geometries, analytic and flume results are compared with approaches for shock- capturing and shock detection A...
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A Finite Element Scheme for Shock Capturing Part 2 pptx
... clearly greater than dgh, this is indeed what happens Therefore any small perturbations are swept toward, and are engulfed in the shock Shock relations in 2- D Previous sections derive the shock ... where, for the shallow-water equations, the depth uses a lower order basis than does the velocity (see, e.g., Platzman (1978) or Walters and Carey (1983)) Typically, these are chosen as depth as an ... equation is enforced Finite elements are a subset of the weighted residual method Here one looks at the solution of a differential equation in a weighted average sense In the Galerkin approach the...
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A Finite Element Scheme for Shock Capturing Part 3 ppsx
... which can detect shocks and increase a automatically The method we employ detects energy variation for each element and flags those elements which have a high variation as needing a larger value ... flume data, for which discrepancy will be due to the hydrostatic assumption made in the shallowwater equations Instead we have a direct way of evaluating the numerical scheme alone As spatial and ... initially constant and supercritical; then the lower boundary is shut so that a wall of water is formed that propagates upstream This speed can be determined analytically, and a comparison is made...
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A Finite Element Scheme for Shock Capturing Part 4 docx
... C, less than appear to lag the analytic shock and Cs greater than leads the analytic shock With the largest C, the calculated shock speed is greater than the analytic by at most 0.00 34 mlsec which ... difference across the shock, 0.1 m The error was a s small as was detectable by the technique for measurement of speed at AX = 0 .4 m so there was no need to go to smaller grid spacing Values of ... profile shock moves upstream It is apparent that as the spatial and temporal resolution improve, the shock becomes steeper The shock is fairly consistently spread over three or four elements; and...
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A Finite Element Scheme for Shock Capturing Part 5 pdf
... 4.0 4 .5 5.0 5. 5 6.0 6 .5 7.0 5. 0 5. 5 6.0 6 .5 7.0 DISTANCE FROM CONTRACTION, FT 0 .5 0 .5 1.0 1 .5 2.0 2 .5 3.0 3 .5 4.0 4 .5 DISTANCE FROM CONTRACTION, FT Figure 28 Comparison of flume and numerical model ... indicates nondimensional quantities and o as a subscript indicates a constant, and These equations can be diagonalized by defining a new variable such that P : A ~ P , where Chapter Testing = A, A, ... diagonal matrix of eigenvalues and Po and P-: are composed of the eigenvectors (and are arbitrary) With the substitution of Equation 55 into 54 and multiplication by P-: we retrieve the diagonalized...
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