A study on size optimization of rocket motor case using the modified 2D axisymmetric finite element model

Abstract

In this study, we evaluated the structural integrity and weight of a rocket motor with a torispherical dome by size optimal design. Size optimal design was achieved by first-order and sub-problem methods, using the Ansys Parametric Design Language (APDL). For rapid design verification, a modified 2D axisymmetric finite-element model was used, and the bolt pre-tension load was expressed as function of the ratio of the cross-sectional area. The thickness of the dome and the cylindrical part of the rocket motor were selected as the design parameters. Our results showed that the weight and structural integrity of the rocket motor at the initial design stage could be determined more rapidly and accurately with the modified 2D axisymmetric finite-element model than with the 3D finite-element model. Further, the weight of the rocket motor could be saved to maximum of 17.6% within safety limit.

Optimum design on suspension joint parts of GFRP composite bogie frame with H-shaped side beams for urban railway trains

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Study of Influential Factors of the Vibration Modal of the Rocket Equipment Bay and Structural Improvement Based on Finite Element Analysis

“…Some applications of finite element analysis in simulation analyses of rockets have been presented. Choi et al [1] evaluated the structural integrity and weight of the rocket motor with a hemispherical dome by analyzing the improved 2-D axisymmetric finite element model. Engberg and Korde [2] verified the possibility of 3-D full-scale finite element modeling by analyzing the two-dimensional finite element acoustic model of the fairing of a launch vehicle.…”