19 pages matching NASTRAN in this book
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The basic intent of this conference was threefold First to explain some of the uses and abuses of the FEM through example
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9-point Hindle mount aberrations actuator airbag algorithm analytical angle aspect ratio astigmatism axial beam bond boundary conditions calculated central hole centroid circular components damping deformations delta-plate displacement distortion edge effect eigenvalues elasticity Engineering epoxy equations figure error finite element analysis finite element method finite element model flexures floating supports forces gradient graphite epoxy grid heat exchanger influence functions integration jitter layup linear load mesh mirror segment modal mode shapes modes motion NASTRAN natural frequency nodal node nonlinear obtained optical elements optical systems optimization orthogonal performance plate Poisson's ratio pressure primary mirror problem radial radius residual error ring shear shell shown in Figure shrinkage solution spherical stiffness matrix stress Structural Dynamics support points support system surface symmetry telescope temperature thermal expansion thickness tube twist variations vectors wavefront Zernike coefficients Zernike polynomials zero