摘要
选取实船液压管路的阀组单元为研究对象,利用有限元软件Ansys建立阀组结构模型,计算阀组单元结构在不同频率载荷激励下的振动响应频谱阀,分析安装间距、阀架阀臂长度、斜撑位置、隔振器安装等制造工艺参数对其声学性能的影响。建立实船、优化以及改进阀组结单元的试验室结构系统,并利用激振器对结构白噪声激励得到仿真计算测点的振动响应频谱,将仿真与试验测试结果的响应频谱进行对比分析。结果表明阀组架臂长对结构振动特性影响较大,相较原始阀组单元加装隔振器的改进阀组单元的结构插入损失高于10 dB,振动特性有明显改善。
In the report,utilizing manifolds unit of hydraulic piping system for the studying object,the research established the analyzing model in the FEM software Ansys,and computed the vibration response of the typical testing point on the structure. Then, the research excited the structure model with white noise signal using exciter, and obtained the vibration amplitude spectrum of the testing point corresponding with simulation computation result. Comparing the simulation results with the experimental result, the study mastered the variation of manifolds structure system influenced its acoustic characteristic, made clear the vibration transmissibility on the research system. The results confirmed the manifolds unit which adding isolators as the most prior aeoustic characteristics structure model.
出处
《舰船科学技术》
北大核心
2013年第4期131-136,共6页
Ship Science and Technology
基金
国家部委基金资助项目
关键词
阀组结构
工艺参数
有限元仿真
试验验证
manifolds structure
technics characteristics
FEM simulation
test validation
