再议钢龙骨刚度对薄板间壁隔声的影响

轻钢龙骨在双层薄板间壁隔声中起着固体声传递作用,它较之经由空腔的空气声传递复杂得多,对间壁的中频隔声更为重要。自上世纪80年代该文作者提出以轻钢龙骨侧向刚度作为预计间壁隔声的参量以来,许多研究工作者在这方面积累了不少理论分析和实验资料,使得龙骨刚度对间壁隔声的影响有了更多认识。文章对此作了评述,并指出双层间壁中间联系构件(钢龙骨)的力学特性这一关键性参量该如何确定,还需作进一步探索。

Re-examination of the metal-stud stiffness on the sound insulation of gypsum-board partitions

For the sound insulation of a double-leaf partition, stud creates a vibration transmission path between leaves that can often be more critical and also more important in mid-frequency range than the airborne path through the cavity. As partitions with light-weight steel stud are more commonly used in the building construction, therefore studies on the sound insulation effect of such stud have been conducted. A model of considering the steel stud as an elastic spring and its lateral stiffness as a parameter in the sound insulation index prediction of such partition initialed by Gu and Wang (1983) has been widely studied during past decades. Experimental results of different stud profiles have been reported from different testing laboratories and give more information to understand the stiffness effect of the stud on the sound insulation of the partition. After a review of this subject in the paper, it has been pointed out that a critical problem on the determination of the stiffness of the connecting elements in the double panel partitions needs to be investigated further.