2006年第2期
玻璃钢/复合材料
13
的作用。这可能与以下几方面因素有关:①由于泡沫夹芯与钢骨架间的结合面增多,增加了结构的传力路径,使结构整体承载优势得以体现;②由于夹芯结构的等效抗弯刚度与夹芯层厚度的平方成正比,等效剪切刚度与夹芯层厚度成正比,因此夹芯层厚度的增加提高了其抗剪承载能力及抗弯刚度
[5]
夹芯制作蒙皮的复合材料司机室的混杂结构,便于采用RFI工艺一次整体成型。在保证司机室强度、刚度的前提下能减少钢材的用量,复合材料司机室自重降至680kg左右,减重约20%,效果明显。
参考文献
[1]胡清寒.复合材料在铁道车辆中的应用[J].国外铁道车辆,1997
(1)∶13216.
[2]GBelingardi,MPCavatorta,R.Materialcharacterizationof
acomposite2foamffrontstructureofahighspeedtrain[J].61∶132251
[.[J].铁
;③
玻璃钢面板为大面积连续成型的,与钢制小块蒙皮铆接相比,在承担平面内大部分拉伸、压缩和剪切载荷时,其变形能力优于钢板,能有效地降低应力集中发生的可能性。
4 结 语
综上所述,,,,增刊∶1972199.
[ANSYS7.0高级分析[M].机械工业出版社,2004.[5]LornaGibson,MichaelFAshby.多孔固体结构与性能[M].清华
大学出版社,2003.
FINITEELENTANALYSISOFCOMPOSITECABFORHIGHSPEEDTRAINS
ZHANGSheng;JIANDa2zhi;ZHOUSheng
1
1
2
(11CollegeofAerospaceandMaterialEngineering,NationalUniversityofDefenseTechnology,Changsha410073,China;21WidegeCo1Ltd1ofZhuzhouElectricLocomotiveWorks,Zhuzhou412001,China)Abstract:http://www.77cn.com.cnparedwithafullsteelcabofthehighspeedtrain,thenewcabstructureisofhigherstiffnessand20%decreaseinweightisachieved.
Keywords:highspeedtrain;GFRP;sandwich;structure;finite;element;structuraldesign
(上接第22页)
STUDYOFTHERMALCONDUCTIVITYOFGFRPSANDWICHSTRUCTURE
PANELSWITHHONEYCOMBCORE
ZHOUZhu2lin,WANGYa2xiong,YAOHui,ZHONGTian2lin(ShanghaiFRPResearchInstitute,Shanghai200126,China)
Abstract:Besideshighspecificstrengthandstiffness,GFRPsandwichstructurepanelswithhoneycombcorepossesslowerthermalconductivityandusedasaheatinsulationmaterial.Inthispaperthetheoreticalstudyofther2malconductivityispresentedonGFRPsandwichpanelswithhoneycombcore.Itanalyzesforconduction,convec2tionandradiation.Thetheoreticalcalculationformulasandcurvesofthermalconductivityaregiven.Goodagree2mentbetweencalculationresultsandexperimentvaluesisobtained.
Keywords:honeycomb;sandwichconstruction;thermalconductivity;GFRP;conduction;convection;radia2tion
FRP/CM 2006.No.2