CAJ | 학술논문

为了研究流体压力脉动引发的振动与噪声影响系统的可靠性，提出了一种结构简单、体积小的复合式压力脉动衰减器结构。以穿孔板结构和板后平衡腔构成一个类似于并联的赫姆霍兹谐振系统，并附以弹性薄板作为振动元件，弹性薄板与流体构成一个耦合的受迫谐振系统，实现了对压力脉动的动力吸振与阻尼减振的有效衰减。基于管路动态特性，建立了管路系统的传递矩阵模型，对脉动衰减器衰减特性进行了仿真分析，并完成了试验样机的制作。试验测试结果表明，该脉动衰减器在较宽频段内有较好的衰减效果，试验结果与理论仿真分析基本吻合。
위료연구류체압력맥동인발적진동여조성영향계통적가고성，제출료일충결구간단、체적소적복합식압력맥동쇠감기결구。이천공판결구화판후평형강구성일개유사우병련적혁모곽자해진계통，병부이탄성박판작위진동원건，탄성박판여류체구성일개우합적수박해진계통，실현료대압력맥동적동력흡진여조니감진적유효쇠감。기우관로동태특성，건립료관로계통적전체구진모형，대맥동쇠감기쇠감특성진행료방진분석，병완성료시험양궤적제작。시험측시결과표명，해맥동쇠감기재교관빈단내유교호적쇠감효과，시험결과여이론방진분석기본문합。
Vibration and noise caused by fluid pressure pulsation in hydraulic system affected system’s operational reliability.A compound pressure pulsation attenuator with simple structure and small size was put forward to solve the question.A perforated-panel structure and balance cavity composed the system which was similar to a parallel Helmholtz resonator system,and an elastic sheet was designed as a vibrating element in fluid to make up a cou-pled forced vibration system,which achieved dynamic vibration absorbing and damping. Based on the dynamic characteristics of pipeline,transfer matrix model of system was built and the simulation of the suppressor attenuation charateristics was conducted.Experimental test on prototype was carried out and results showed nice performance over a wide frequency band which basically agreed with simulation results.