基于模糊推理的复合材料柔性梁损伤识别研究  

Damage identification for composite flexible beams using a fuzzy logic system

作　　者：黄烨[1] 郑世杰[1] 

机构地区：[1]南京航空航天大学航空宇航学院智能材料与结构航空科技重点实验室,江苏南京210016

出　　处：《兵器材料科学与工程》2010年第4期26-30,共5页Ordnance Material Science and Engineering

基　　金：国家自然科学基金项目(10772077);重点项目(50830201);中国航空科学基金(2007ZD52047)资助

摘　　要：模糊理论具有处理不确定性信息的能力,在表征复杂的结构健康监测系统内、外部参数的类属、性态等的不精确、不明晰性方面具有独特的优势。为了监测复合材料层合结构的脱层损伤,引入以微观力学理论为基础的连续性损伤力学模型,提出用于模糊推理损伤监测系统的新的损伤表征参数,该损伤参数从脱层损伤的几何本质上描述脱层损伤的特性,比常规的以各方向弹性模量减少为特征的损伤表征更具有准确性和直观性。建立基于新的损伤参数的模糊推理损伤监测系统,并将其应用于复合材料柔性梁的脱层损伤监测中,仿真算例表明该系统可以快速、准确地识别出结构损伤的位置和程度。With the ability of handling uncertainty,fuzzy theory has unique advantages in terms of charactering the internal and external parameters of complex structural health monitoring system,which lacks accuracy and clarity in its generic,behavior,etc.In order to monitor delamination damage in composite laminated structures,a continuum damage model based on micromechanics theory is used in this paper to propose a new damage parameter which could be used in fuzzy logic-based damage identification system.This damage parameter,which describes the delamination damage from essential geometrical properties,is more accurate and intuitive than the other damage parameters,which characters damages with reduction of engineering modulus in different direction.Using the new damage parameter,a fuzzy logic-based damage monitoring system was constituted and applied to composite flexible beams in this paper,and simulation examples show that this system can identify the location and extent of structural damages quickly and accurately.

关 键 词：复合材料 损伤识别 模糊推理 脱层损伤 损伤表征参数 

分 类 号：TB381[一般工业技术—材料科学与工程]