| The guidance fiber-optic cable package is an important part of the fiber-guided missile.The quality of the package is crucial to the successful launch of the missile,and the fiber winding process determines its quality.Due to the lack of simulation analysis tools for the fiber winding process research,only simulation experiment research can be carried out,but the experimental research environment is complicated,the cost is extremely high,and it is time-consuming and labor-intensive.Therefore,in engineering practice,there are still many problems to be studied and solved urgently in the optical fiber winding process.In view of the above problems,this thesis takes the design of wire package winding process simulation software and simulates the internal stress and strain during the wire package winding process as the research direction.The main research contents are as follows:(1)Parametric modeling and parameter optimization of the geometric structure of the guided optical fiber package.Through the necessary simplification of the wire package geometric model,this paper determines the mathematical relationship between the geometric parameters of the wire package model,and the correctness of the parameterized modeling solution result within the allowable error range is verified,and the simulation of the wire package winding process is established.The model laid the foundation.At the same time,for the two optimization goals of the least number of layers of the wire package and the smallest size of the wire package,the geometric parameters of the wire package are optimized by the enumeration method and the genetic algorithm respectively.As an approximate optimization genetic algorithm,there is randomness in the process of searching for the optimal solution,so the stability of the optimization result is inferior to the enumeration method.(2)Material mechanical properties modeling of equivalent optical fiber.Based on the composite material mechanics,the material properties of the composite fiber are analyzed,and the material mechanics characteristic model of the equivalent fiber is established,and the material property parameters of the equivalent fiber are obtained,which provides data support for the establishment of the material model in the process simulation.(3)Solve the residual tension inside the optical fiber package.Based on the theoretical knowledge of elastic mechanics,the formula for solving the residual tension in the wire package is deduced,and the numerical problem of the load in the process simulation is solved.And the residual tension under the linear taper winding tension system is solved and analyzed.The solution results show that when the taper coefficient k=0,that is,under the constant tension system,the residual tension on the optical fiber gradually decreases from the inside to the outside of the cable package,and the overall remaining tension distribution form is internally loose and externally tight;When the taper coefficient k≠0,selecting a reasonable taper coefficient k value on the optical fiber layer will help to obtain a more uniform residual tension distribution form that is tight inside and loose outside.(4)Designed the wire package winding process simulation software,and carried out the wire package winding process simulation.Based on the parametric modeling of the wire package geometric structure,the equivalent optical fiber mechanical characteristic model and the study of the residual tension of the wire package winding,and based on MATLAB and ANSYS software,designed a wire package winding process simulation software composed of three parts:the wire package geometric structure parameterized modeling and parameter optimization module,the residual tension solution module and the process simulation module.The software can complete the parameterized design and structural optimization of the wire package geometric structure,as well as solve the residual tension of each fiber layer of the wire package and perform mechanical simulation of the wire package winding process.This provides a tool for designing and optimizing the geometric structure of the wire package,and the solution result of the residual tension provides a basis for optimizing the winding tension system.And applied it to the mechanical simulation study of the winding process of the wire package,the results show that under the constant tension winding system:a.From the inside to the outside of the optical fiber package,the equivalent stress of the optical fiber layer becomes larger and larger layer by layer,and the stress on the innermost layer of the optical fiber is the smallest.During the winding process of the in-line package,the stress of the wound fiber layer will decrease with the increase of the number of fiber winding layers.b.From the inside to the outside of the optical fiber package,the radial stress of the optical fiber layer is getting smaller and smaller,while the hoop stress is getting bigger and bigger.The radial stress of the innermost fiber is the largest,and the hoop stress is the smallest.During the winding process of the in-line package,the radial stress of the wound fiber layer will increase with the increase of the fiber winding layer,and the hoop stress will decrease.c.From the inside to the outside of the optical fiber package,the radial strain of the optical fiber layer changes little,while the hoop strain increases layer by layer.During the winding process of the in-line package,the hoop strain of the wound fiber layer will decrease as the wrapping layer of the wire wrapping increases. |
