Leissa, "Free vibration of the rectangular parallelepiped, " Journal of the Acoustical Society of America, vol.
Zhang, "On the three-dimensional vibrations of the cantilevered rectangular parallelepiped, " Journal of the Acoustical Society of America, vol.
Two fully dense solid models, having geometries identical to that of the cubic and
rectangular parallelepiped porous models, are also prepared and analyzed under loading and boundary identical to that of the corresponding porous models to serve as the control for the computation of the relative stress and stiffness parameters that are going to be used for the purpose of optimization and determination of relative reduction in stiffness that is achieved through the incorporation of porosity.
The Eigenvalue-Eigenfunction Problem for the Operator [[DELTA].sub.x][I.sub.3] in a
Rectangular ParallelepipedAs regards the calculations with FastHenry, it has to be noticed that each parallelogram of the planar zig-zag spiral inductor is represented as a thin
rectangular parallelepiped of width w and length l.
After these they constructed
rectangular parallelepipeds (see Figure 1), square pipes, curved square pipes and various other shapes (see Figure 3).