组合机床与自动化加工技术
組閤機床與自動化加工技術
조합궤상여자동화가공기술
MODULAR MACHINE TOOL & AUTOMATIC MANUFACTURING TECHNIQUE
2014年
9期
35-38
,共4页
连杆%雨流计数法%疲劳寿命%共振%可靠性分析
連桿%雨流計數法%疲勞壽命%共振%可靠性分析
련간%우류계수법%피로수명%공진%가고성분석
connecting rod%the rain flow count method%the fatigue life%resonance%reliability analysis
以某发动机连杆为研究对象，基于有限元方法结合模态分析基本理论，对连杆进行了可靠性分析，得到了连杆的疲劳寿命、模态振型和共振区域。分析结果表明，连杆在发动机工作过程中承受复杂的载荷，连杆小头与杆身过渡部位疲劳寿命最小，也是连杆设计的薄弱环节。最后对连杆进行了谐响应分析，得到了连杆大头孔位置处X、Z方向位移与激励频率的关系曲线，找到易发生共振区域，从而使设计人员能够预测连杆的持续动力特性，为连杆的结构设计或者进一步的优化设计提供理论依据。
以某髮動機連桿為研究對象，基于有限元方法結閤模態分析基本理論，對連桿進行瞭可靠性分析，得到瞭連桿的疲勞壽命、模態振型和共振區域。分析結果錶明，連桿在髮動機工作過程中承受複雜的載荷，連桿小頭與桿身過渡部位疲勞壽命最小，也是連桿設計的薄弱環節。最後對連桿進行瞭諧響應分析，得到瞭連桿大頭孔位置處X、Z方嚮位移與激勵頻率的關繫麯線，找到易髮生共振區域，從而使設計人員能夠預測連桿的持續動力特性，為連桿的結構設計或者進一步的優化設計提供理論依據。
이모발동궤련간위연구대상，기우유한원방법결합모태분석기본이론，대련간진행료가고성분석，득도료련간적피로수명、모태진형화공진구역。분석결과표명，련간재발동궤공작과정중승수복잡적재하，련간소두여간신과도부위피로수명최소，야시련간설계적박약배절。최후대련간진행료해향응분석，득도료련간대두공위치처X、Z방향위이여격려빈솔적관계곡선，조도역발생공진구역，종이사설계인원능구예측련간적지속동력특성，위련간적결구설계혹자진일보적우화설계제공이론의거。
For one engine connecting rod, using the finite element method combining with basic theory of modal analysis, the fatigue life of connecting rod, modal vibration mode and the resonance area are obtained thought the reliability analysis was carried out on the connecting rod. The analysis results show that the point closing to small head position is the weakest points and the fatigue life is minimum. The graphs which the big end hole location X, Z direction displacement changes as excitation frequency and the regions where easy to produce resonance are obtained during connecting rod working process through harmonic anslysis, allowing designers to predict the continuous dynamic characteristics of connecting rod and providing a theoretical basis of the structural design and the future design optimization of the connecting rod .
