基于有限元的飞机易损性建模方法研究  

Modeling Aircraft for Vulnerability Assessment Based on Finite Elements Method

作　　者：裴扬[1] 宋笔锋[1] 韩庆[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《系统仿真学报》2007年第16期3619-3622,3649,共5页Journal of System Simulation

基　　金：国家自然科学基金(10372082);中国博士后基金(20060400301);西北工业大学青年科技创新基金(W016218)

摘　　要：提出了一种用于飞机易损性分析的输入模型建立方法,所提供的模型包括飞机外形易损性模型及部件易损性模型。对于飞机外形模型,主要提供几何尺寸参数及材料参数。对于部件模型,主要提供几何尺寸参数、材料参数、杀伤模式、致命性标识,以及部件杀伤与飞机杀伤的逻辑关系等数据。应用中表明,所提出的方法具有以下特点:(1)飞机及部件外形的几何形状均采用有限元逼近,可以真实的反映实际情况;(2)模型考虑了液体模型的建立方法;(3)致命部件及非致命性部件单独建模,可以减少人为因素影响;(4)与有限元建模软件结合紧密,可以减少重复性的工作。An approach for constructing the models for aircraft vulnerability assessment was proposed based on finite elements method. The provided models include aircraft configuration model and component model. The aircraft configuration model is used to provide the geometric perimeters and material composition of aircraft outer skin. The component model is used to provide the internal component geometric perimeters, material composition, kill modes, criticality flag, and the logic expression of component kill with aircraft kill. Analysis shows that the proposed modeling method has the following advantages, （1） the aircraft or component geometry is approximated by finite element patches, which may well reflect the reality, （2） the liquid model is considered, （3） critical and noncritical component are modeled separately, so as to reduce the human errors, and （4） it has good interface with the commonly used finite element modeling software, which may reduce the repetitive work.

关 键 词：易损性 有限元 建模 致命性 

分 类 号：V221[航空宇航科学与技术—飞行器设计]