复合材料波纹梁的抗撞可靠性分析

摘要: 复合材料波纹梁因具有极佳的比吸能特性得到了广泛的应用，然而复合材料的结构参数及材料特性离散性较大，有些不确定参数对波纹梁抗撞性产生很大的影响，因此考虑对抗撞性影响较大的不确定性参数对波纹梁进行抗撞可靠性分析具有重要的工程意义。本文以复合材料波纹梁为研究对象，针对结构中非概率参数的不确定性问题，引入多维椭球凸模型技术，并结合显式有限元技术和多项式响应面模型技术，进行不确定性传播分析，从而找出影响波纹梁抗撞性较大的不确定性参数，对波纹梁的抗撞性可靠性进行分析。结果表明，基于多维椭球凸模型的复合材料抗撞可靠性分析方法具有较高的精度和较强的工程实用性。
- 可靠性分析 /
- 复合材料 /
- 抗撞性 /
- 凸模型 /
- 波纹梁
Abstract: Composite corrugated beam is widely used for excellent specific energy absorption characteristics. However the structure parameters and material properties of the composite material have large dispersion, some of them impact on the crashworthiness of composite corrugated beam. Therefore, analysis of crashworthiness reliability by considering the uncertainty parameters which has greater impact on crashworthiness has important engineering significance. In this paper, for these non-probability uncertainty problem of elastic constants of composite material, introducing the technology of multi-dimensional ellipsoidal convex model, by combined with explicit finite element technology and response surface modelling technology, uncertainty propagation analysis is conducted, so as to find out the uncertainty parameters which have a great influence on the crashworthiness of corrugated beam, and then to analyze the crashworthiness reliability of corrugated beam. The results show that the crashworthiness reliability analysis method of composite material based on the multi-dimensional ellipsoidal convex model has high precision and strong practicability.
- reliability analysis /
- composite material /
- crashworthiness /
- convex model /
- corrugated beam

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