Investigation On Arresting Dynamics For Carrier-Based Aircraft With Consideration Of Arresting Hook Bounce

As the main equipment for carrier-based aircraft landing, the function of arresting devices is absorbing and dissipating longitudinal kinetic energy of aircraft. Aircraft is forced to stop in a short distance by arresting devices. It is used to provide safety for pilot and aircraft. In order to engage the cable successfully by arresting hook, the bounce of arresting hook after impacting with runway must be controlled during arrestment. Arresting devices should have capacity of arresting the aircraft with different mass and velocity. Those problems are analyzed, the dynamic problems of arresting hook impacting, arresting devices and aircraft arresting are studied, the parameters of hook longitudinal damper and arresting devices oil orifice are designed. The main contents in this thesis are shown as follows:The collision dynamics explanations of the arresting hook bounce when the aircraft landing are studied. Using the impacting theory of rigid body, the models of the hook bounce after initial touchdown in symmetrical plane of aircraft are built. The dynamics performances of hook bounce affected by model parameters are studied. The results show that the bounce angle velocity of arresting hook is inverse proportion with deck angle of cosine,the bounce angle velocity of arresting hook is increased by deck barrier,the effect of runway friction can be neglected in hook bounce problem.Considering the pitch and roll movement of carrier aircraft landing platform, the six degrees impacting model of the aircraft arresting hook is established. The bounce performance of arresting hook affected by pitch and roll of carrier is analyzed. The displacement of arresting hook without longitudinal damper after impacting is solved and analyzed. A method of longitudinal damper design is provided. The results show that the angle velocity and impulse of collision of hook in horizontal plane is nonzero; the hook can't engage the cable after impacting with deck by gravitation, the bounce height and length of arresting hook can be controlled by choosing appropriate damper parameters, which is necessary to engage the cable.Taking carrier-based arresting device as example, the components of arresting device and the function of those components are studied; the method of arresting device design is also discussed. The symmetrical arresting model based on energy method considering aircraft thrust is built, the arresting force is deduced according to aircraft arresting rules. The dynamic model of arresting devices is established without considering cable flexibility; the equation of arresting force is expressed as the area of constant runout control valve. The kink wave caused by arresting hook and its propagation performance are analyzed. The movements of arresting hook by cable stress are calculated and analyzed; it is also proved that arresting hook must be prevented to impact fuselage by some facilities. Based on dynamic model of arresting devices, the curves of arresting force about constant runout control valve area are designed under constant runout condition. The arresting dynamic performance of aircraft with different mass is obtained. The arresting forces obtained by this method are satisfied with the requirements of American military standard.The aircraft models are built, the whole aircraft drop are also stimulated. Under constant runout condition, the arrestments of aircraft with different velocity, different thrust and different pitch angle are stimulated,the results of landing gear loads and the arresting performance of aircraft are obtained,. Comparing with the arresting results,the dynamic performance of aircraft and landing affected by arresting conditions are analyzed.