Reference no: EM132309196

Topology Optimisation of Bridge Beam Profiles

1 Outline

The introduction of advanced manufacturing systems and technologies that combine a range of additive and subtractive techniques, has enabled engineers to move beyond standard designs and geometry. Moreover, the advancement of algorithms that are de- signed to optimise geometry based on the component or structure boundary conditions has enabled a new class of geometry design and manufacturing.

In order to adopt complex geometries and new manufacturing techniques, engineers need to be familiar with the various aspects of generative design and, in particular, how commercial applications such as ANSYS implement these.

In your groups, you will scope two beam pro les from the truss bridge in assignment 1, and extract information on the deformations with respect to the beam boundary con- ditions. You will take these inputs, and perform a topology optimisation to show where material that does not e ect the stresses developed in the structure could potentially be removed.

2 Objectives

The aim of this project is to work within a group environment and conduct a topology optimisation study on two separate beam pro les used in your individual projects. You will need to perform the optimisation on two beam pro les for two di erent materials:

1. Beam pro le that contains a xed support (Geometry 1)
2. Beam pro le that is used as a cross member supporting the bridge platform (Ge- ometry 2)

This means that you will need to get together as a group and discuss which models and materials to use. As the inputs to the topology optimisation in the Static Structural environment will be displacements, determine which group member's assignment 1 bridge analysis resulted in the greatest displacements on Geometry 1 and Geometry 2 as illus- trated in Figure 1. Then extract displacement information from the scoped beams to use as inputs for the topology optimisation study. The topology optimisation study will then be orientated around reducing the mass of the beams by 25%, 50% and 75%. The studies you need to perform are listed in Table 1 below. Note: the table below can be interpreted in the following manner: Study Geometry . Material . Mass% .

Figure 1: Scoping location and method for obtaining displacement information.

The process you need to follow in order to conduct a topology optimisation study is as follows, with speci cs on the points below described in greater detail in section 3:

• From your individual assignment, scope the two beams mentioned above and extract displacement data.

Table 1: List of studies to be performed in group project

Mass %	Geometry 1      Geometry 1      Geometry 2      Geometry 2 Material 1         Material 2         Material 1         Material 2
25	Study	1.1.25	Study	1.2.25	Study	2.1.25	Study	2.2.25
50	Study	1.1.50	Study	1.2.50	Study	2.1.50	Study	2.2.50
75	Study	1.1.75	Study	1.2.75	Study	2.1.75	Study	2.2.75

• Start a new Workbench project, drag in a Static Structural analysis, import one of the beams and apply the boundary conditions to re ect the loading conditions from the model.
• Solve the Static Structural, and check that the de ections are similar to those ex- perienced by those in the original model. They do not need to be exactly the same as the purpose of this group project is the topology optimisation study.
• Now drag in a Topology Optimisation module onto the results of the static struc- tural, i.e., so that there are links between the relevant cells.
• In topology optimisation, create named selections for boundary conditions and lo- cations that need to remain unaltered from the topology optimisation.
• Ensure that your objective is set to minimise the Compliance, and your response constraint is set to Mass, with the various levels to retain as per Table 1.

4 Technical Report Layout

The report can be laid out as follows.

• Use size 12 font for the body text, and format section and titles accordingly.
• Font can be Timed New Roman, Calibri or similar.
• Use spell check and read your assignment before submitting.
• Reference gures and other sources of information. Use a referencing tool such as Zotero
• Use the numeric IEEE style type.
• The work limit is 1000 per person, maximum.

To ensure your submission ts the page/word count ranges, make certain to count words in the body using your word processor and then add in the equivalent word counts for your tables and images. References do not count towards the wordcount. Figures and tables are counted by the amount of words they replace. A good rule of thumb is 50 words per image (picture, graph, spectrum, etc.). Figures with two images (e.g. 1A and 1B) are counted as 100 words. Three images amount to 150 words and so on. Brief tables are counted as 100 words each, while longer or wider tables can be up to one full page (200 words). Make sure you include only highly relevant images and remove non- essential images to help your manuscript be more reader-friendly while tting within the page/word limits. A Technical Report can contain the sections listed in Table 2.

Systéme International (SI) units are to be used. Non-SI measurements can be in- cluded, but they should follow the SI measurement in parentheses. An example is 2.54 cm (1.00 inch).

Attachment:- Group Assignment Civil.rar