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The boundary element method with programming for engineers and scientists - phần 8 pps

The boundary element method with programming for engineers and scientists - phần 8 pps

The boundary element method with programming for engineers and scientists - phần 8 pps

... 0xH,0yH 388 The Boundary Element Method with Programming The Hankel functions can be expanded to4 (14.12) where 0.57721J (Euler constant) and here only the first terms of the expansion ... continuous elements and then with the program prog111_discont, the discontinuous version of the multi-region program. If we compare the tractions at interface elements in Figures 12.7, 12 .8 with ... 8 ! Nodes 4 ! Elements 1.000 1.000 0.707 0.707 1.000 0.000 0.707 -0 .707 0.000 -1 .000 1234364 The Boundary Element Method with Programming where (13.30) The discretised form...
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The boundary element method with programming for engineers and scientists - phần 1 pps

The boundary element method with programming for engineers and scientists - phần 1 pps

... 212 8. 3 PROGRAM 8. 2 : Replacing assembly by element- by -element procedure 213 8. 3.1 Sample input file 219 8. 3.2 Sample output file 219 16 The Boundary Element Method with Programming When the ... 203 8. 1 The Element by Element Concept 204 8. 1.1 Element- by -element storage requirements 206 8. 2 PROGRAM 8. 1 : Replacing direct by iterative solution 206 8. 2.1 Sample input file 211 8. 2.2 ... F. The KIND of the arrays would have to match the Fortran REAL *8 precision. The significance of the other parameters need not concern the applications programmer. 18 The Boundary Element...
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The boundary element method with programming for engineers and scientists - phần 5 pps

The boundary element method with programming for engineers and scientists - phần 5 pps

... -0 .02236 0.00079 0.00079 -0 .00 787 -0 .00123 - 0.00 787 -0 .005 08 -0 .005 08 -0 .005 08 -0 .00 787 - 0.00 787 -0 .00123 -1 0.00000 0.00000 0.00000 -1 0.00000 0.00000 0.00000 -1 0.00000 0.00000 0.00000 -1 0.00000 ... distinguish between values inside the domain and on the boundary. For the computation of results the integral equation for 232 The Boundary Element Method with Programming the displacement (5.16) or ... 596 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 597 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 5 98 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 -1 0.0 0.0 0.0 599 -1 0.0...
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The boundary element method with programming for engineers and scientists - phần 7 ppsx

The boundary element method with programming for engineers and scientists - phần 7 ppsx

... side of the beam are the same and agree very well with the analytical solution, except for the coarse mesh with continuous elements. For the discontinuous mesh with 3 elements and for the continuous ... 332 The Boundary Element Method with Programming We now investigate the other possibilities for the location of iP . iP is located at one of the discontinuous nodes inside the element and the ... computers. The method may also be used for coupling boundary with finite elements, as outlined in Chapter 12. We will therefore only discuss the second method here. For the explanation of the first...
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The boundary element method with programming for engineers and scientists - phần 9 ppsx

The boundary element method with programming for engineers and scientists - phần 9 ppsx

... previously if the point aP is not one of the cell nodes. If Pa coincides with the nodes of cells, then the integrand tends to infinity with o(r2) for 2-D and o(r3) for 3-D problems and special ... ()ut4 38 The Boundary Element Method with Programming Figure 16.2 Interface between finite element and boundary regions showing interface forces In the first method of coupling we propose that the ... Numer. Methods Eng. 36 (21), 357 9-3 594. 4 28 The Boundary Element Method with Programming the interface nodes. Since the beam is fixed on the left our problem has only 2 interface unknowns. For...
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The boundary element method with programming for engineers and scientists - phần 2 pptx

The boundary element method with programming for engineers and scientists - phần 2 pptx

... linear elements (c) one quadratic element 40 The Boundary Element Method with Programming If the element shape functions for the quadratic element are derived from Lagrange polynomials, then there ... is substituted for i,j and (4. 58) is the Kronecker Delta. For the boundary element method we also need the solutions for the boundary stresses (tractions) acting on a surface with an outward ... are the same infinite shape functions as for the one-dimensional element, with K substituted for [ and the values for m(n) and k(n) are given in Table 3.3 Table 3.3 Values for m and k...
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The boundary element method with programming for engineers and scientists - phần 3 doc

The boundary element method with programming for engineers and scientists - phần 3 doc

... be written and used for numerical experiments. As the 1 38 The Boundary Element Method with Programming We see that since R cancels out, the integral is valid for any radius of the circle, ... 1.0 0.7 18 0. -5 . 0. -4 .5 0. -4 . 0. -3 .5 0. -3 . 0. -2 .5 0. -2 . 0. -1 .5 BOUNDARY INTEGRAL EQUATIONS 117 or in discretised form using line segments (5.51) where (5.52) The flows ... norm of the error in satisfaction of the boundary conditions is a minimum. For a boundary value problem, either u or t is specified and the other is the unknown to be determined by solving the...
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The boundary element method with programming for engineers and scientists - phần 4 pot

The boundary element method with programming for engineers and scientists - phần 4 pot

... matrices and then solve for the boundary unknowns and another where the assembly and solution are intermixed. The analogy to this in the FEM is the direct solution and the Element by Element ... So the information that is needed for the assembly is the Connectivity or Destination vector and the boundary code for each element. Note that the boundary code is defined locally for each element ... 188 The Boundary Element Method with Programming job specification, geometry and boundary data. They are read in by calling three separate subroutines Jobin, Geomin and BCinput. The job information...
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The boundary element method with programming for engineers and scientists - phần 6 pot

The boundary element method with programming for engineers and scientists - phần 6 pot

... Results, Element 6 u= -0 .075 -0 .5 08 0.075 -0 .5 08 0.000 -0 .5 08 t= 0.000 -1 0.000 0.000 -1 0.000 0.000 -1 0.000 272 The Boundary Element Method with Programming Required are the displacements and the ... EXAMPLES 287 Results, Element 3 u= 0. 480 E-04 0. 480 E-0 4-0 .467E-03 0.744E-04 0.000E+0 0-0 .468E-03 0.000E+00 0.000E+0 0-0 .723E-03 0.000E+00 0.744E-0 4-0 .468E-03 t= 0.000 0.000 -0 .707 0.000 ... 2.0 0 .8 2.0 0.9 The output obtained from program 9.1 is Post-processed Results Results at Boundary Elements: Element 1 xsi= -1 .00 eta= -1 .00 Stress: -2 96.90 -6 . 28 0.00 -2 98. 89 Element...
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the boundary element method with programming for engineers and scientists - phần 10 pot

the boundary element method with programming for engineers and scientists - phần 10 pot

... 1-4 Q ( 1-3 QQ 1-4 Q C 8 -1 /8 Q - Q /8 -1 /15Q C9 3-4 Q ( 3- QQ 4-5 Q C10 1 ( 1-3 QQ 1-5 Q C11 -1 /16GQ - Q/16G -1 /30GQ C12 1 1 7-5 Q ... 1-4 Q ( 1-3 QQ 2-1 0 Q C14 1-2 Q ( 1-3 QQ 1-4 Q C15 1 ( 1- QQ 1-2 Q C16 G/4( 1- Q GQ/4 G/15( 1- Q C17 1-4 Q 12+10 Q C 18 -1 /8( 1- Q - Q /8 -1 /30( 1- Q ... 17 .8. The aim of the analysis was to ascertain the range of validity of 2-D analyses carried out with a distinct element code. 4 78 The Boundary Element Method with Programming Figure 18. 2...
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