Structural Optimization Design And Simulation Research Of Retractable Tethered Balloon Winch

Tethered balloon system,as a kind of air-staying platform,has super long endurance,high cost performance,and has high civil and military value.The retractable tethered balloon winch is an important equipment for balloon lift-off recovery and aerial detention,which is related to the reliable operation and security of the tethered mission.In view of the traditional integrated winch of traction and cable storage can not meet the task requirements,this paper applies a technology of separation of traction and cable storage,designs a set of retractable winch with the characteristics of tension release,flexible automatic cable arrangement double drive,and studies and optimizes its related technologies.Although the winch is used for tethering balloons,the relevant research methods and conclusions can be used for reference in the design of similar winch,mine winch or marine winch.Firstly,according to the characteristics of mooring conditions such as heavy load,large capacity rope and small work space,various schemes of cable,power source,drum groove,automatic cable arrangement and layout of traction winch are analyzed.Based on the advanced winch design experience at home and abroad,a structure scheme of separation of storage and traction is adopted.The box type closed structure of double drum traction winch is improved to open type support structure,which is convenient for assembly and maintenance in the future.Secondly,combined with the technical requirements of the retractable task launch,the parametric design of the key components of the traction winch and the cable storage winch was carried out.The drive parameters of the retractable winch are calculated and the motor type is selected.In order to arrange the cables orderly,the key parameters of flexible array cable are determined,the length of each layer of cable was calculated,and the capacity of the cable storage winch was verified.Using CAD technology,a 3D assembly model of the retractable winch was drawn to pave the way for subsequent simulation.Thirdly,aiming at the phenomenon that the multi-layer winding of the cable is easy to be disordered,a double fold rope groove is designed,and the problem of interlayer transition of cables is studied.According to the multi-layer winding law of the cable on the double-folded rope groove drum,the mathematical model of any section of the rope climbing block is established by the method of subsection design,and the design and layout form of the rope climbing block are completed.By establishing the 3D model of the rope climbing block and winding cable,the process of layer transition motion of cable is analyzed.Fourthly,the mechanical model of key components such as cable storage drum and traction winch is built,and the strength and rigidity of them are checked by CAE technology.The principle of "tension release" of traction winch is emphatically analyzed,and the influence of equivalent friction coefficient,total cable angle and centrifugal tension on tension attenuation effect and load-bearing state of two winches is explored.The cable tension on each rope groove of the winch is calculated and the rationality of the tail tension of the traction winch is checked.Finally,the key components of the winch are optimized and improved.By using the orthogonal experimental method,the orthogonal experimental of three factors and three levels about the drum is designed,and the preliminary design of its conservative is improved.The mathematical model of multi-objective optimization design of five design variables of winch was established,and sensitivity analysis and response surface analysis were carried out.Design Exploreration optimization tool and multi-objective genetic algorithm are used to optimize the design of winch and realize the lightweight of winch.