工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2014年
4期
31-34,35
,共5页
陈雅君%杨春壮%王超%马祥艳%钱立军
陳雅君%楊春壯%王超%馬祥豔%錢立軍
진아군%양춘장%왕초%마상염%전립군
轻质GMT%吸音系数%面密度%成型厚度%透气率
輕質GMT%吸音繫數%麵密度%成型厚度%透氣率
경질GMT%흡음계수%면밀도%성형후도%투기솔
light weight GMT%sound absorption coefficient%areal density%molded thickness%permeability rate
研究了轻质玻璃纤维毡增强热塑性复合材料(GMT)板材的面密度、成型厚度、透气率以及GMT汽车内饰顶棚与钣金间隙4个因素与顶棚吸音性能的关系。结果表明，GMT汽车内饰顶棚的吸音系数受GMT板材面密度的影响不大，但随成型厚度的增加而增大；高透气率的顶棚的吸音系数在高频区最大；增加GMT汽车内饰顶棚与钣金之间的间隙可以显著提高顶棚在低频和中频区的吸音系数。
研究瞭輕質玻璃纖維氈增彊熱塑性複閤材料(GMT)闆材的麵密度、成型厚度、透氣率以及GMT汽車內飾頂棚與鈑金間隙4箇因素與頂棚吸音性能的關繫。結果錶明，GMT汽車內飾頂棚的吸音繫數受GMT闆材麵密度的影響不大，但隨成型厚度的增加而增大；高透氣率的頂棚的吸音繫數在高頻區最大；增加GMT汽車內飾頂棚與鈑金之間的間隙可以顯著提高頂棚在低頻和中頻區的吸音繫數。
연구료경질파리섬유전증강열소성복합재료(GMT)판재적면밀도、성형후도、투기솔이급GMT기차내식정붕여판금간극4개인소여정붕흡음성능적관계。결과표명，GMT기차내식정붕적흡음계수수GMT판재면밀도적영향불대，단수성형후도적증가이증대；고투기솔적정붕적흡음계수재고빈구최대；증가GMT기차내식정붕여판금지간적간극가이현저제고정붕재저빈화중빈구적흡음계수。
By varying four factors:the areal density,molded thickness,permeability rate of light weight glass mat thermoplastics(GMT) and the gap between car interior ceiling and sheet metal,the relationship between these factors and the sound absorption performance of GMT automotive ceiling were discussed. The results show that the areal density of GMT has very low effect on the sound absorption coefficient ,but it increases with the increase of molded thickness. The sound absorption coefficient of the ceiling with the high air permeability rate in the high frequency area is highest. Increasing the gap between the car interior ceiling and sheet metal can significantly improve the sound absorption coefficient of the ceiling in the low frequency and intermediate frequency .
