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首页> 外文会议>AIAA/ASCE/AHS/ASC structures, structural dynamics and materials conference;AIAA SciTech Forum >Development of Three-dimensional Structural Analysis for Engine Nozzle Using Anisotropic Facet Shell Element
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Development of Three-dimensional Structural Analysis for Engine Nozzle Using Anisotropic Facet Shell Element

机译：基于各向异性小平面壳单元的发动机喷嘴三维结构分析开发

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The purpose of this paper is to develop the structural analysis for prediction of the sideward loads acting on the inner wall of the rocket engine nozzle. Three-dimensional structural analysis was performed using the facet shell element. This was created by combining the optimal triangle membrane element (OPT) with the discrete Kirchhoff triangle (DKT) plate bending element. The laminated composite material was considered by modifying the formulation of stress-strain relationship so as to include the membrane-bending coupling effect. For the time transient analysis, Newmark implicit time integration method was used. To consider the realistic engine nozzle structure, validation of equivalent structural modeling was conducted. Parallel computation using FETI-local method was utilized to alleviate the computational cost due to discretization of large size engine nozzle structure.
机译：本文的目的是发展结构分析，以预测作用在火箭发动机喷嘴内壁上的侧向载荷。使用小面壳元素进行了三维结构分析。这是通过将最佳的三角形膜元件（OPT）与离散的Kirchhoff三角形（DKT）板弯曲元件相结合而创建的。考虑通过改变应力-应变关系的公式以包括膜-弯曲耦合效应来考虑层压复合材料。对于时间瞬态分析，使用了Newmark隐式时间积分方法。为了考虑实际的发动机喷嘴结构，进行了等效结构模型的验证。由于大型发动机喷嘴结构的离散化，利用FETI-local方法进行并行计算可减轻计算成本。

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