【摘要】 对于乐器用代替材料的设计，通过振动测试系统测定了一些木质乐器材料的比动态模量和对数衰减系数等振动特性。将乐器用木材的振动特性同通用木材运行了比较。通常，从以上参数可以计算出各种音响特性，发现了乐器用木材的特点，与通用木材相比，具有高比动态模量和低对数衰减系数的特点。但从单向ＣＦＲＰ和ＣＦＲＰ的测试结果发现，这些材料不具备乐器用代替材料的特性。因为，仅用ＦＲＰ作为乐器用代替材料是不可能的。我们试制了两种粘结结构并研究其振动特性。一种是２层结构，ＣＦＲＰ／ＥＶＡ泡沫粘结组合。另外一种是３层夹层结构ＦＲＰ，／软木／ＦＲＰ粘结组合。结果证明，通过改变ＥＶＡ泡沫位置，可控制振动特性。因此，建议使用２种３层夹层结构材料，即ＣＦＲＰ／软木／ＣＦＲＰ和ＧＦＲＰ／软木／ＧＦＲＰ。在这些结构中，表皮层／中心层的厚度比对振动特性有很大影响。实验证明：通过控制厚度比，可使ＧＦＲＰ／软木／ＧＦＲＰ具有乐器用材料的振动特性。这些结果表明：使用ＦＲＰ的２层结构和３层夹层结构对于乐器用代替材料的设计是有效的。更多还原

【Abstract】 For the designing of foe musical instrument material substitutes, the vibration properties, specific dynamic modulus and logarithmic decrement of some wooden musical instrument materials are measured by the vibration testing system. The vibration proprties of wooden musical instrument materials are compared with those of wooden ganeral - purpose materials. Generally various acoustic properties can be calculated from the above parameters. It is found that the musical instrument materials had higher dynamic meduli and lower logarithmic decrements than the wooden general - purpose materials. From the testing results of unidirectional CFRP and GFRP, it is also found that these materials can’ t have the same properties as the musical instrument material substitutes. Because it is impossible to design musical instrument material sub stitutes by only FRP, we fabricate two types of ’adhesive structures and investigate these vibration pamper ties. One is the 2 - layered structure, CFRI,/EVA foam. The other is the sandwich structure, FRP/Balsa/ FRP. It is confirmed that vibration properties can be controlled by changing the EVA foam position. Two types of the sandwich structures, CFRP/Balsa/CFRP and GFRP/Balsa/GFRP are proposed. In these structures, the skin/core thickness ratio has a great influence on the vibration properties. By controlling the thickness ratio, it is confirmed that the GFRP/Balsa/GFRP can have the same vibration properties as the musical instrument materials. There results indicate foal the 2 - layered structure and the sandwich structure using FRP are effective for designing musical instrument material substitutes.更多还原