小型内燃机与车辆技术
小型內燃機與車輛技術
소형내연궤여차량기술
Small Internal Combustion Engine and Motorcycle
2014年
6期
65-70
,共6页
贾志超%吕哲%潘德槐%刘天胜
賈誌超%呂哲%潘德槐%劉天勝
가지초%려철%반덕괴%류천성
发动机%异响%模态%共振
髮動機%異響%模態%共振
발동궤%이향%모태%공진
Engine%Abnormal noise%Modal%Torsion resonance
测试了某异响发动机工作时的声压和振动加速度，通过异响工况下的加速度功率谱密度曲线结合曲轴自由模态分析结果诊断出了异响问题的原因-曲轴共振。对引起共振的激励源-发电机及点火系统进行改进，使激励能量足够小从而消除了该发动机的异响。该共振异响问题的解决，对类似问题具有参考和指导意义。
測試瞭某異響髮動機工作時的聲壓和振動加速度，通過異響工況下的加速度功率譜密度麯線結閤麯軸自由模態分析結果診斷齣瞭異響問題的原因-麯軸共振。對引起共振的激勵源-髮電機及點火繫統進行改進，使激勵能量足夠小從而消除瞭該髮動機的異響。該共振異響問題的解決，對類似問題具有參攷和指導意義。
측시료모이향발동궤공작시적성압화진동가속도，통과이향공황하적가속도공솔보밀도곡선결합곡축자유모태분석결과진단출료이향문제적원인-곡축공진。대인기공진적격려원-발전궤급점화계통진행개진，사격려능량족구소종이소제료해발동궤적이향。해공진이향문제적해결，대유사문제구유삼고화지도의의。
Sound pressure and vibration acceleration of a working engine is tested. The reason of abnormal noise and torsion resonance is discovered by acceleration power spectral density curve and crankshaft free modal analysis result. Electric generator and ignition system,which are the excitation resource of the abnormal noise,are improved to reduce the excitation energy. Then the abnormal noise was eliminated. On the base,the general method,which can be used to solve similar resonance abnormal nose problem,is obtained. The method has reference and guidance function on the resolving of the similar problem.
