Tutorials

Sesam Knowledge Centre Sesam.Starter Tutorials

GeniE tutorials

The GeniE installation comes with many tutorials. Sesam.Starter is a subset of GeniE’s capabilities and the tutorials relevant for Sesam.Starter are the first four basic tutorials (B1, B2, B3 and B4), which can be found on the GeniE help pages.

Before you start creating your own projects, you should learn the basics on modelling of structure and loads from tutorials B1 and B2. Tutorial B3 will give you a quick introduction on how to do member code checking.

Helideck example project

You could also challenge yourself on doing a very small helideck design including one design iteration based on member code checking. In the example below the section properties are set to fail initially so you can learn how to do re-design (change properties and see effect on code check result based on existing structural analysis results) and a full design iteration (update analysis model, run analysis and code check).

The task at hand is to make a helideck as follows. Detailed instructions can be found in the videos below:

• Part 1: Make a project, define section and material properties
• Part 2: Define the primary structure of the helideck
• Part 3: Define the secondary structure of the helideck
• Part 4: Define the columns and supporting braces
• Part 5: Make the load-cases and load-combinations
• Part 6: Run structural analysis and investigate deformations
• Part 7: Do a member code check and a re-design of three worst failing members

The general layout

The main dimensions and the section properties are shown below. The material to be used is steel and has yield limit of 355 MPa.

Stiffener spacing

The loads

There shall be a gravity loadcase (g=-9.81 m/s²) and a helicopter at two different positions.

The helicopter shall be modelled as an equipment with 3 footprints. The size of the equipment is 3m tall, 15m long and 4m wide with a mass of 20 tonnes. The footprint has the following dimensions:

The positions (cog of equipment) of the helicopter are:

• Position 1 at x = 12.5m, y = 8.25m, z = 0m

  

  Figure 5. Helicopter load at position 1 on beams.

• Position 2 at x = 9m, y = 12.5m, z = 0m

  

  Figure 6. Helicopter load at position 2 on beams.

Combine the gravity load with helicopter positions and use scaling factors 1.3 and 5 respectively.

Perform a linear structural analysis followed by a member code check using ISO 19902 revision 2020.

Finally, do a re-design of failing members before a design iteration is done to ensure consistency between structural model and code check model.

The result of your project should look like this if you follow the steps in the videos.