华中科技大学学报（自然科学版）2017，Vol.45Issue(4)：78-83,6.DOI:10.13245/j.hust.170415
缸盖表面各振动响应信号耦合关系的分析
Coupling relationship analysis on the vibration signals of cylinder-head surface
摘要
Abstract
As the vibration signal measured on engine cylinder head contains low-frequency component with large amplitude,to investigate the cause of the low-frequency component and its coupling relationship with combustion excitation response signal,a simulation model of the cylinder head and the engine block representing the type of 195-diesel engine was established and used to analyze the excitation sources of the low-frequency component.Research results show that the low-frequency component in the vibration signals is mainly caused by the reciprocating inertia force and the friction force of the piston.Filtering the vibration signal with high-pass filter method has no obvious effects on identifying the start of combustion,the location of the maximum pressure rise rate and the location of the peak pressure,but would cause a greater loss of amplitude dependent information.The vibration signal before 300 ℃A is mainly excited by the reciprocating inertia force and the friction force.关键词
内燃机/振动分析/非燃烧激励/时频分析/耦合关系Key words
internal combustion engines/vibration analysis/non-combustion excitation/time-frequency analysis/coupling relationship分类
能源科技引用本文复制引用
王洋,程勇,纪少波,兰欣..缸盖表面各振动响应信号耦合关系的分析[J].华中科技大学学报（自然科学版）,2017,45(4):78-83,6.基金项目
国家自然科学基金资助项目(51376111) （51376111）
国家重点基础研究发展计划资助项目(2013CB228404). （2013CB228404）
