3325 大形宇宙構造物のモデル化誤差の低減

概要

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This paper describes mass matrix identification of finite-element models. Mass matrix is corrected by minimizing the Euclidean norm subject to constraints specified from physical points of view. As can be seen from the dynamic equation, there is the relations between mass and stiffness matrices to obtain a true solution. Therefore the effect of stiffness is considered in the identification to improve the prediction accuracy of dynamic characteristics. This method is applied to a deployable truss structure. A numerical example is given to demonstrate that the proposed method is effective for system identification. It is found that the identified mass and stiffness matrices can provide a highly accurate finite-element model mating with both the vibration test and the mass property test results.
一般社団法人日本機械学会の論文
2003-08-05