摘要
基于经典层合板理论,计及加强筋弯曲及扭转运动影响,建立无限大单向加筋层合板在平面声波激励下的声透射理论模型;应用空间谐波展开与虚功原理,推导出单向加筋层合板传声损失公式,并与解析解及简化模型计算结果对比,验证所建模型的精度及有效性;系统研究特征参数对加筋层合板结构隔声性能影响。研究表明:增加层合板铺设角度对结构隔声性能不利,材料损耗因子只影响结构共振频率处隔声性能;增大加强筋间距,加筋层合板结构低频段隔声性能下降明显,但全频段隔声性能有所改善;声波入射角度对单向加筋层合板隔声性能影响显著,结构对垂直入射声波隔声效果最好。
Based on the classical laminated plate theory and taking the influence of bending and torsional movement of stiffeners into account, the theoretical sound transmission model of an infinite single stiffened laminated plate excited by a plane sound wave was developed. The transmission loss （TL） expression was derived by using the space harmonic expansion and the principle of virtual work. Then, the accuracy and effectiveness of the proposed model was qualified by comparing model predictions with calculation results in the literature. Finally, the impact of different parameters on the sound insulation performance was studied through numerical calculation. The results indicate that the increase of laying angle has no benefits for the sound insulation performance. Material loss factor only affects the sound insulation at structural resonance frequency. Within the low frequency range, the sound insulation performance decreases significantly as the stiffener spacing is increased. But, in the whole frequency range, the sound insulation performance is improved. The angle of incident wave plays an important role in sound insulation. The oblique incident sound wave transmits through the structure more easily than the normal incident sound.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第22期88-94,共7页
Journal of Vibration and Shock
基金
中国博士后基金(20100471026)
国家自然科学基金项目(51209052)
黑龙江省青年科学基金资助项目(QC2011C013)
哈尔滨市科技创新人才研究专项资金项目(2011RFQXG021)
关键词
经典层合板理论
加筋层合板
隔声
空间谐波展开法
classical laminated plate theory
stiffened laminated plate
sound insulation
spaceharmonic expansion method
