K-0914 複合圧力容器の網目補強(J05-1 FRP構造物物性)(J05 複合材料の加工と評価)

概要

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A new concept of structural reinforcement for compressed natural gas vehicle fuel containers is presented with formulation of structural optimization. The reinforcement is done by net, whereas the conventional composite containers are fabricated with continuous filament winding. The production efficiency is aimed at by the net reinforcement with high structural reliability ensured by means of structural optimization technique. The net is modeled as truss structure contacting with the surface of the metallic liner, which is modeled as elastic solid finite elements. The geometrical nonlinearity with the finite rotation of net members raises the shape finding of the net. The position of connection node is analyzed on the basis of principle of minimum strain energy with the iterative solution finding. The cylinder part of the container is relatively simple structure, so that the net reinforcement of spherical dome is taken into consideration. The optimum length of net member is determined so as to realize uniform strain net. A formulation of the sensitivity analysis is derived to constitute the governing equation of the optimum length, which is summarized in linear simultaneous equations. An optimum configuration of the net is searched for through the numerical example.
2001-08-22