CAJ | 학술논문

针对某风冷单缸柴油机气缸套-活塞环摩擦力测试过程中活塞敲击气缸套产生的振动对测试精度的影响问题，通过功率单元的动力学分析、模态分析及谐振响应分析，确定了系统激振力、气缸套固有频率及受迫振动的频率范围。在不改变气缸套结构的前提下，依据柴油机不同工况的载荷条件，设计相应的可避免产生共振的弹性阻尼装置并进行了试验验证。结果表明：弹性阻尼装置可有效抑制活塞敲击气缸套产生的振动，能够为气缸套-活塞组摩擦力的准确测量提供保障。
침대모풍랭단항시유궤기항투-활새배마찰력측시과정중활새고격기항투산생적진동대측시정도적영향문제，통과공솔단원적동역학분석、모태분석급해진향응분석，학정료계통격진력、기항투고유빈솔급수박진동적빈솔범위。재불개변기항투결구적전제하，의거시유궤불동공황적재하조건，설계상응적가피면산생공진적탄성조니장치병진행료시험험증。결과표명：탄성조니장치가유효억제활새고격기항투산생적진동，능구위기항투-활새조마찰력적준학측량제공보장。
For the piston knock influencing measurement of friction force between cylinder liner and piston ring in an air-cooled single cylinder diesel ,the system excitation force and the natural and forcing frequency of cylinder liner were determined based on the dynamic analysis ,modal analysis and harmonic oscillation response analysis of power unit .On the basis of keeping the cylinder liner structure unchanged ,the elastic damping device was designed and verified according to different loads of engine operating conditions .The results show that the device can restrain the piston knock effectively and ensure the accurate meas-urement of friction force between cylinder liner and piston ring .