螺栓连接及其预紧力矩对船舶约束阻尼板振动特性的影响  

Effect of Bolt Pre-tightening Torque upon the Vibration Characteristics for a Constraint Damping Plate

作　　者：徐得志[1] 任晋宇[1] 

机构地区：[1]武汉交通职业学院船舶与海洋工程学院,武汉430065

出　　处：《船海工程》2016年第4期54-57,共4页Ship & Ocean Engineering

基　　金：湖北省高等学校教学研究项目(2011440)

摘　　要：针对船舶约束阻尼板的不同敷设工艺方案,通过数值仿真计算及试验测试约束阻尼板的结构模态阻尼因子,分析螺栓及螺栓预紧力矩对结构模态阻尼因子的影响。仿真计算与试验结果发现,在约束阻尼层上增加螺栓后,各阶模态阻尼因子明显增加;当螺栓预紧力矩在一定范围时,绝大部分的各阶模态频率略有增加,但变化值较小,约束阻尼板上的螺栓不仅可以固定阻尼胶板还能明显增加阻尼板的减振降噪性能,但螺栓预紧力矩对阻尼板振动性能影响不大。Aiming at the different technique scheme for the constraint damping plate,the influences of the bolt arrangement and pre-tightening torque upon the structural modal damping factor are analyzed by numerical and experimental methods. The results show that when the bolt number is increased,the modal damping factor of the constrained plate is increased remarkably;when the pre-tightening torque of bolts is increased,the modal frequency increases slightly. So that the bolts can obviously increase the damping noise reduction performance of damping plate,in addition to the fixed damping rubber sheet,but the bolt pretightening torque plays small role on acoustic performance.

关 键 词：螺栓预紧力矩 约束阻尼板 模态特征 安装工艺 

分 类 号：U661.44[交通运输工程—船舶及航道工程]