Method and device for calculating mooring load of ship-borne aircraft based on catenary model

Abstract

The invention discloses a ship-borne aircraft tether load calculation method based on a catenary model, which comprises the following steps: simplifying an aircraft model, equivalently taking an aircraft wheel as a spring model, equivalently taking an aircraft fuselage as a rigid body, and equivalently taking a deck as a rigid body; according to the simplified aircraft model, the displacement typeof rigid body structure being determined; by coordinate transformation, the displacement of any point on the rigid body being expressed as the combination of the deformation displacement of the aircraft wheel and the sliding displacement of the rigid body in the plane of the deck; simplifying the tethered rigging model, and constructing the catenary mechanics model of the tethered rigging according to the stress characteristics of the tethered rigging in the relaxed state; taking the force balance of tethered cable as the constraint condition, the simultaneous equations of tethered cable loadbeing constructed and solved by Newton-Raphael method through numerical iteration, and the tethered cable load being obtained. The method for calculating the mooring load of a ship-borne aircraft based on the catenary model provided by the invention can realize fast and accurate calculation of the mooring load of the ship-borne aircraft.

Description

technical field [0001] The invention relates to the technical field of ship mechanics, in particular to a method and device for calculating mooring loads of ship-borne aircraft based on a catenary model. Background technique [0002] In recent years, my country's official law enforcement ships, scientific research ships, and naval surface ships have developed rapidly, and ship-borne aircraft have gradually become routine equipment for large ships. When the ship is under the influence of wind, waves, and surges, it will produce complex swinging motions. The deck aircraft will bear different degrees of inertial loads in each degree of freedom. If the securing load exceeds the safety threshold of the aircraft structure or deck mooring device, the aircraft structure or deck will The moorings would be damaged and a larger deck accident could be triggered. [0003] Affected by the complex environment such as deck wind, pitch and roll, and the complex multi-body system formed by t...

AI Technical Summary

Problems solved by technology

When the ship is under the influence of wind, waves, and surges, it will produce complex swinging motions. The deck aircraft will bear different degrees of inertial loads in each degree of freedom. If the securing load exceeds the safety threshold of the aircraft structure or deck mooring device, the aircraft structure or deck will The moorings will be damaged and a bigger deck accident could be triggered

[0003] Affected by the complex environment such as deck wind, pitch and roll, and the complex multi-body system formed by the coupling of aircraft body, wheel, flexible rigging, steel deck, wheel chock, etc., conventional numerical calculation methods are still difficult to effectively carry out shipboard aircraft mooring. load calculation

One is that the mooring structure of deck aircraft is a typical nonlinear statically indeterminate problem, and the deformation of the mooring cable presents an alternating state of tension and relaxation, which is difficult to solve mathematically; It is difficult to effectively apply conventional linear mechanical calculation models such as rod elements and beam elements. In addition, the force of mooring cables varies greatly, and conventional equivalent models or simplified analysis methods will fail to varying degrees.

Although dynamic simulation software such as ADAMS can better simulate the loading and deformation conditions of tires, landing gear struts, and airframes, there is no suitable rope element in the software to simulate the mooring sling, and it is necessary to develop a suitable rope element

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