双层圆柱壳结构减振设计及模型试验研究
发布时间：2018-10-26 13:58
【摘要】：为降低双层圆柱壳动力舱结构振动辐射噪声,对双层圆柱壳进行了减振设计和模型试验研究。基于环肋结构增抗原理和模态振动控制理论,提出了非均匀阻抗增强环肋结构形式;为减小双层壳间振动波的传递,将阻振质量和粘弹性夹层引入到实肋板结构设计中,采用波动理论分析了复合阻波特性。联合应用非均匀阻抗增强环肋和复合阻波肋板设计了一种双层壳模型,并开展了空气中两端简支和水下悬浮激振试验;将设计模型测试结果和数值仿真计算结果与基准模型进行了分析比较。结果表明:设计模型较原结构振动明显减弱,具有较好的减振效果,验证了双层壳结构减振设计的有效性。
[Abstract]:In order to reduce the vibration and radiation noise of the bilayer cylindrical shell, the vibration absorption design and model test were carried out. Based on the theory of ring rib reinforcement and modal vibration control, a non-uniform impedance enhanced ring rib structure is proposed. In order to reduce the transmission of vibration wave between two layers of shells, the vibration resistive mass and viscoelastic interlayer are introduced into the design of real ribbed plate structure. The wave theory is used to analyze the composite wave resistance characteristics. A double-layer shell model was designed by using non-uniform impedance reinforced ring rib and composite wave resistant rib plate, and the experiments of suspended vibration at both ends of air and underwater suspension were carried out. The test results of the design model and the numerical simulation results are analyzed and compared with the benchmark model. The results show that the design model is obviously weaker than that of the original structure and has a better damping effect. The effectiveness of the design of the double shell structure is verified.
【作者单位】： 海军装备研究院;海军工程大学舰船工程系;
【基金】：国家自然科学基金(51205404) 国防科技预研基金项目(4011101020101)
【分类号】：U661.44
本文编号：2295945
[Abstract]:In order to reduce the vibration and radiation noise of the bilayer cylindrical shell, the vibration absorption design and model test were carried out. Based on the theory of ring rib reinforcement and modal vibration control, a non-uniform impedance enhanced ring rib structure is proposed. In order to reduce the transmission of vibration wave between two layers of shells, the vibration resistive mass and viscoelastic interlayer are introduced into the design of real ribbed plate structure. The wave theory is used to analyze the composite wave resistance characteristics. A double-layer shell model was designed by using non-uniform impedance reinforced ring rib and composite wave resistant rib plate, and the experiments of suspended vibration at both ends of air and underwater suspension were carried out. The test results of the design model and the numerical simulation results are analyzed and compared with the benchmark model. The results show that the design model is obviously weaker than that of the original structure and has a better damping effect. The effectiveness of the design of the double shell structure is verified.
【作者单位】： 海军装备研究院;海军工程大学舰船工程系;
【基金】：国家自然科学基金(51205404) 国防科技预研基金项目(4011101020101)
【分类号】：U661.44
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