Assignment 1 Introduction to CAE and FEA 25 marks Due date: Monday 15th April (9:00 am) Introduction In this assignment you will be required to apply the skills you have learnt in the lectures in the areas of preparing CAD geometry for FEA, element selection, meshing and mesh optimisation as well as model simplification. In the first part of this assignment you will be required to numerically analyse the feasibility of a slewing jib crane. Thereby you will follow the logic flow of starting with a highly simplified model and verifying your results with simple hand calculations. After this you will increase the complexity of your model and identify the model set up that leads to sufficient model accuracy combined with the lowest calculation time. Design Brief CranesâRâUs has employed you to assess the structural integrity of the initial design of the slewing jib crane shown in Figure 1. The height and span of the crane is 5 m and the crane will carry a maximum load of 50 tonnes (~50,000N). The crane is manufactured from a structural steel grade (provided in the ANSYS Material Library) and the material data is supplied in Table 1. The customer requires that the slewing jib crane must not deflect over 25 mm under full load (50,000N), when loaded at its maximum span and that the equivalent combined stress in the structure may not exceed 150 MPa. The client has provided you with a detailed CAD model of the final slewing jib crane assembly, to begin your analysis (Slewing_Jib_Crane.x_t). This can be seen in Figure 2. Project Requirements/Tasks: The project is broken down into 5 key tasks: 1. Quickly assess the structural integrity of the crane by using an idealised beam element model. You must assess whether the current design meets the compliance (deflection) and maximum stress criteria. 2. Validate your initial beam model with a simple hand calculation to ensure your FEA model is accurate. 3. Provide some design recommendations to the client. You do not need to perform
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