The sound insulation of bulkhead walls and the dynamic stiffness of resilient core materials were investigated. Bulkhead panels are expected to be lightweight, stiff, and good sound insulation, i.e., exhibiting features that are usually incompatible. The research aimed to investigate how different panel components influence the acoustic performance, examine the various effect of a core, and face modifications and provide practical guidelines that may be useful for design purpose. The study is based on laboratory measurements; seven full-scale models of bulkhead partitions were tested. The panels consisted of a core made of mineral wool and metal faces bonded to it on either side. The position of fundamental mass-spring-mass resonance was examined in particular. This depends on the dynamic stiffness of a core, which is standardly tested under a static load of 200 kg/m² whereas in practice the mass of faces is much lower; thus, the influence of the preload on the measured values was analysed experimentally. Adjustment of a solid core’s technical parameters influenced the acoustic performance of a panel in a limited degree. Further modifications of the core and faces gave more promising results. The weighted sound reduction index of 50 mm thick models ranged from 31 dB to 45 dB.

研究了舱壁的隔音性能和弹性芯材的动态刚度。隔壁板有望轻巧，坚硬且具有良好的隔音性，即具有通常不兼容的特征。这项研究旨在调查不同的面板组件如何影响声学性能，检查纤芯的各种效果以及表面修饰，并提供可用于设计目的的实用指南。该研究基于实验室测量；测试了七个全尺寸隔板隔板模型。面板由矿棉制成的芯和在其两侧粘合的金属面组成。特别检查了基本质量-弹簧-质量共振的位置。这取决于铁芯的动态刚度，²而实际上，面孔的质量要低得多；因此，通过实验分析了预紧力对测量值的影响。实心芯的技术参数的调整在一定程度上影响了面板的声学性能。进一步修改核心和表面可提供更可喜的结果。50毫米厚型号的加权降噪指数范围为31 dB至45 dB。