Finite Element Analysis of a UAV Wing

AeroVironment’s Global Observer is an unmanned aircraft with the wingspan of a Boeing 767 but less than 10% of the weight designed to provide communications and sensing for flights lasting up to one week at up to 65,000 feet. With a maximum wing loading of only 3.5 pounds per square feet, the wingtip deflects greater than 22 feet at its design limit load.

MSC Nastran was utilized to develop nonlinear stress, structural dynamic and aeroelastic finite element models. The structural dynamics model was correlated to a ground vibration test, both of which had to accommodate the apparent mass of the air, which is atypical. The ultimate test of the nonlinear stress model was correlation with the static wing load test.


Patran Fields

Fields in Patran are used whenever you need to define variable (non-constant) data. Applications include material properties, element properties, or load variations as a function of time, frequency, or spatial position. Fields are also helpful to map results between dissimilar meshes. Practical uses are briefly described below.


Patran Tip – Displaying IDs: Solid 1.4, Surface 4.2, etc.

Question: I need to apply a pressure to face Solid 1.4, how can I display this ID on the viewport? Answer: Go to Utilities>Display>Geometry Free Faces/Edges… and check on Free Faces, Free Edges, or Free Vert. and Face Label. Want to expand your knowledge? Watch a SimAcademy webinar. SimAcademy webinars teach you how to use ...

Patran Tip – Identify Entity IDs On-the-fly

Question: How do I get ID numbers to appear on an entity as I move my mouse over them? Answer: Go to Preferences>Picking and check on “Label Highlighting.” Whenever you hover over an entity, the ID becomes visible. Want to expand your knowledge? Watch a SimAcademy webinar. SimAcademy webinars teach you how to use the ...

Patran Tip – Group Transform: Translate, Rotate, Mirror, and more

Question: Is there a way to easily rotate a group of elements? Answer:Yes, you can “transform” groups such that you translate, rotate, scale, mirror, and more. In addition, the associated boundary conditions and element properties are carried over. You can use the tool as follows: Option 1: In the model tree, you can right click on ...

2 Free Composites Technology Days with MSC Nastran

Can MSC Nastran beter allow you to design your advanced composite material designs? To help you answer this question, MSC Software be hosting 2 Free Composites Technology days with MSC Nastran, and you are invited to attend. Topics that will be covered include: First Ply Failure Delmaniation Residual strength  Crack assessment Optimize composite materials for ...