排灌机械工程学报2013，Vol.31Issue(2)：142-145,4.DOI:10.3969/j.issn.1674-8530.2013.02.011
船舶用输液管路新型消声器特性分析
Analysis on characteristics of new muffler for marine pipelines
摘要
Abstract
In order to reduce pipeline-radiated noise and fluid pulsation, a new muffler was designed and developed. Through experiments and simulations, the performance of the new muffler was evaluated. Its transmission losses was calculated by one-dimensional model and 3D finite element model. The radiated noise at the pipe mouth before and after the installation of the muffler was measured by a hydrophone and compared. Fluid-solid coupling finite element software Adina was used to evaluate the muffler's capacity of reducing pulsation. The results show that the one-dimensional calculation model is in agreement with 3D finite element model in predicting the transmission loss of the muffler. The pipeline-radiated noise is chiefly related to the cycle noise of the motion system of the pipeline and the fluid pulsation rate. Therefore, to reduce fluid pulsation can also reduce the pipeline-radiated noise at the pipeline mouth. The muffler reduce radiated noise caused by some special frequencies significantly, the sound pressure level was reduced to 3. 5 dB for the one third octave at 6 000 Hz. Elastomers added to the inner side of the muffler will couple the fluid and the elastomers, which is helpful in improving the fluid pulsation. When the fluid pulsation rate is 250 Hz and the elasticity coefficient of elastomer is 267 MPa, the amplitude of the fluid pulsation can be reduced up to 70% .关键词
消声器/流体脉动/管路辐射噪声/试验/数值模拟Key words
muffler/fluid pulsation/pipeline radiated noise/experiment/numerical simulation分类
交通工程引用本文复制引用
许伟伟,吴大转,王乐勤,郝宗睿..船舶用输液管路新型消声器特性分析[J].排灌机械工程学报,2013,31(2):142-145,4.基金项目
国家自然科学基金资助项目(51206101) （51206101）
中央高校基本业务费专项资金资助项目 （）
