中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2011年
13期
1629-1633
,共5页
转向节%应力场强法%随机激励%损伤区域%疲劳寿命
轉嚮節%應力場彊法%隨機激勵%損傷區域%疲勞壽命
전향절%응력장강법%수궤격려%손상구역%피로수명
steering knuckle%stress field intensity approach%random excitation%damage region%fatigue life
利用多体动力学理论建立了双横臂悬架系统的刚柔耦合动力学模型,采用国家B级路面谱进行模拟激励,得到了汽车转向节的六分力时间历程。结合转向节有限元模型,获得了转向节实时等效单元应力,通过统计确定了最易疲劳的损伤区域。运用应力场强理论来计算应力场强,并使用雨流计数法进行了统计,综合计算了转向节的疲劳寿命。结果显示,连接车轮横臂处最易发生疲劳破坏,特定条件下的疲劳循环寿命为2.4×107次。
利用多體動力學理論建立瞭雙橫臂懸架繫統的剛柔耦閤動力學模型,採用國傢B級路麵譜進行模擬激勵,得到瞭汽車轉嚮節的六分力時間歷程。結閤轉嚮節有限元模型,穫得瞭轉嚮節實時等效單元應力,通過統計確定瞭最易疲勞的損傷區域。運用應力場彊理論來計算應力場彊,併使用雨流計數法進行瞭統計,綜閤計算瞭轉嚮節的疲勞壽命。結果顯示,連接車輪橫臂處最易髮生疲勞破壞,特定條件下的疲勞循環壽命為2.4×107次。
이용다체동역학이론건립료쌍횡비현가계통적강유우합동역학모형,채용국가B급로면보진행모의격려,득도료기차전향절적륙분력시간역정。결합전향절유한원모형,획득료전향절실시등효단원응력,통과통계학정료최역피로적손상구역。운용응력장강이론래계산응력장강,병사용우류계수법진행료통계,종합계산료전향절적피로수명。결과현시,련접차륜횡비처최역발생피로파배,특정조건하적피로순배수명위2.4×107차。
The fatigue life of a steering knuckle was predicted using finite element method,multi-body dynamics and stress field intensity approach.Six-component forces of all steering knuckle joints were obtained in time history by multi-body suspension system dynamic simulation.Then the most easily fatigue damage region was confirmed.The stress fields were then calculated at each step and the numbers of each stress field value were counted by rain flow method.The fatigue life was then calculated by stress field intensity approach.The results show that the connected region between wishbone and rib is the most easily damaged region and the fatigue life is 2.4×107 time.
