Undamped Extension of a Nose Landing Gear
In aviation, components are categorized based on the consequences of a failure. This categorization significantly determines the development costs, test quantities and maintenance cost. A simulation can show how serious such a failure can be and thus simplify the classification of the components and finally may reduce costs. This paper describes the simulation of the undamped extension of a nose landing gear of an aircraft. Normally, a hydraulic cylinder is used to extend the landing gear in a controlled manner. The simulation will investigate what happens when this hydraulic cylinder fails completely. Then the landing gear drops down when opening the flaps simply due to its own weight and pushes hard into its end stop. The simulation should show, if afterwards a safe landing is possible.
https://www.dynalook.com/conferences/12th-european-ls-dyna-conference-2019/aerospace/lietz_cadfem.pdf/view
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Undamped Extension of a Nose Landing Gear
In aviation, components are categorized based on the consequences of a failure. This categorization significantly determines the development costs, test quantities and maintenance cost. A simulation can show how serious such a failure can be and thus simplify the classification of the components and finally may reduce costs. This paper describes the simulation of the undamped extension of a nose landing gear of an aircraft. Normally, a hydraulic cylinder is used to extend the landing gear in a controlled manner. The simulation will investigate what happens when this hydraulic cylinder fails completely. Then the landing gear drops down when opening the flaps simply due to its own weight and pushes hard into its end stop. The simulation should show, if afterwards a safe landing is possible.
Lietz_CADFEM.pdf
— 2.8 MB