2550 断熱性と剛性向上の最適構造設計に関する研究

概要

論文の詳細を見る
Structural optimum design improving both the thermal insulation and the bending stiffness is investigated for the fuel tank of liquefied natural gas vehicle. Assuming that the thermal insulation and the bending stiffness are represented by the heat flow at the boundary and the displacements at the loaded points, respectively, we set modified objective function which consists of normalized heat flow, normalized displacement and penalty function for the volume constraint. Nodal positions on the free boundary are changed for the shape optimization. Use is made of the steepest descent method for the minimization of the objective function. The derivative for the steepest descent is evaluated by means of the difference calculus based on the finite element analysis. The step width for the optimum solution is determined by the golden section method. The validity of the proposed method is proven through two dimensional problems.
一般社団法人日本機械学会の論文
2002-09-20