Abstract
Load-bearing structures with kinematic functions enable and disable degrees of freedom and are part of many mechanical engineering applications. The relative movement between a wheel and the body of a car or a landing gear and an aircraft fuselage are examples for load-bearing systems with defined kinematics. In most cases, the load is transmitted through a predetermined load path to the structural support interfaces. However, unexpected load peaks or varying health condition of the system's supports, which means for example varying damping and stiffness characteristics, may require an active adjustment of the load path. However, load paths transmitted through damaged or weakened supports can be the reason for reduced comfort or even failure. In this paper a simplified 2D two mass oscillator with two supports is used to numerically investigate the potential of controlled adaptive auxiliary kinematic guidance elements in a load-bearing structure to adapt the load path depending on the stiffness change, representing damage of the supports. The aim is to provide additional forces in the auxiliary kinematic guidance elements for two reasons. On the one hand, one of the two supports that may become weaker through stiffness change will be relieved from higher loading. On the other hand, tilting due to different compliance in the supports will be minimized. Therefore, shifting load between the supports during operation could be an effective option.
Highlights
Defined kinematics are often an important part of the functional performance in load-bearing systems with moving structural components
If properties or health conditions, e. g. damping and stiffness characteristics or strength of the supports vary over time, load path adaption, e. g. from a weaker support to a stronger one, could be an option to prevent the structure from failure or reduce comfort
This paper shows the potential of active auxiliary kinetic guidance elements in a simple two mass oscillator to adapt the load path with the guidance elements according to different stiffnesses of the supports by numerical simulation
Summary
Defined kinematics are often an important part of the functional performance in load-bearing systems with moving structural components. To numerically investigate the potential of controlled active auxiliary kinematic guidance elements in a load-bearing structure, a simplified 2D two mass oscillator with two supports is used in this work.
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