The Chartership Forum

Computational Engineering / module 3

Parametric thinking

Building a model that describes a family of structures rather than one, and knowing which parameters are worth having.

What you will understand

  • Define a parameter, and distinguish independent from dependent ones
  • Express geometry as rules rather than as coordinates
  • Choose the parameters that matter and refuse the ones that do not
  • Explain why a parametric model is a liability if nobody can read it
  • Read a parametric sweep as a design tool rather than as a form generator

Lessons

  1. What a parameter is

    Independent and dependent quantities, rules instead of coordinates, and why the choice of parameters is the design.

  2. Parametric structures

    Generating grids, trusses, diagrids and tapered towers — and reading the numbers that come with them.

Module summary
  • A parameter is an input that other things are derived from, not a number you happen to have typed
  • Independent parameters are chosen; dependent ones are computed, and confusing them creates contradictions
  • The value of a parametric model is the questions it lets you ask, not the shapes it makes
  • Every parameter added multiplies the space to explore, so add them deliberately
  • A model nobody but its author can change is a model with one user and a short life
  • Rationalisation — repetition, buildability, standard components — is a design objective, not an afterthought
Teaching basis and review status

These are educational models and exercises. Check their assumptions before using the results. The full technical content and every diagram have not yet been independently verified.

Concrete and steel calculations retain their stated first-generation Eurocode teaching basis. Use the standards and amendments specified for your project; do not mix generations without an appropriate design basis.

Read the lesson register and outstanding review notes

Check your understanding

Check yourself

What is the strongest argument for building a model parametrically?

Practice

A parametric study varies five parameters at eight values each. How many combinations are there in a full factorial sweep?