1. Reference problem#

1.1. Geometry#

_images/100020A2000028B900001D8F07876160CF147A61.svg

  • pipe outer diameter: \(0.185m\)

  • pipe thickness: \(6.12m\)

  • radius of curvature of the elbows: \(0.922m\)

1.2. Material properties#

\(E=1.658E+11\mathrm{Pa}\)

\(\nu =0.3\)

\(\rho =13404.106\mathrm{kg}/{m}^{3}\) (pipe full of water)

1.3. Boundary conditions and loads#

Points 1 and 15 embedded (\(u=v=w={\theta }_{x}={\theta }_{y}={\theta }_{z}=0\)).

Loading: not applicable for modal analysis.

For spectral analysis: definition of an acceleration spectrum at the supports for a damping of \(\text{2\%}\).

Frequency (\(\mathrm{Hz}\))

1

10

10

30

100

10000

Acceleration (\(g\)) following \(x\) and \(y\)

0.2

0.2

0.2

Acceleration (\(g\)) following z

0.1

0.1

0.1