汽车技术
汽車技術
기차기술
AUTOMABILE TECHNOLOGY
2013年
9期
25-29
,共5页
变速器%阶梯轴%扭转振动%模态分析%分布质量弹性体%有限元
變速器%階梯軸%扭轉振動%模態分析%分佈質量彈性體%有限元
변속기%계제축%뉴전진동%모태분석%분포질량탄성체%유한원
Transmission%Stepped shaft%Torsional vibration%Mode analysis%Distributed mass elastic body%Finite element
以某国产轿车变速器输入轴的扭振模态为研究对象，建立基于分布质量弹性体的连续阶梯轴扭振模型，计算该轴的前4阶扭振固有频率和对应模态振型。同时建立基于有限元法的离散阶梯轴扭振模型，对比了划分9个和13个扭转单元的有限元模型与分布质量弹性体模型在计算该轴前4阶扭振固有模态上的误差，可知划分13个扭转单元的有限元模型计算误差较小，既满足工程实际中不超过5%的误差要求，又保证有较少的自由度，可以代替分布质量弹性体模型对该变速器输入轴扭振模态的计算进行离散及简化。
以某國產轎車變速器輸入軸的扭振模態為研究對象，建立基于分佈質量彈性體的連續階梯軸扭振模型，計算該軸的前4階扭振固有頻率和對應模態振型。同時建立基于有限元法的離散階梯軸扭振模型，對比瞭劃分9箇和13箇扭轉單元的有限元模型與分佈質量彈性體模型在計算該軸前4階扭振固有模態上的誤差，可知劃分13箇扭轉單元的有限元模型計算誤差較小，既滿足工程實際中不超過5%的誤差要求，又保證有較少的自由度，可以代替分佈質量彈性體模型對該變速器輸入軸扭振模態的計算進行離散及簡化。
이모국산교차변속기수입축적뉴진모태위연구대상，건립기우분포질량탄성체적련속계제축뉴진모형，계산해축적전4계뉴진고유빈솔화대응모태진형。동시건립기우유한원법적리산계제축뉴진모형，대비료화분9개화13개뉴전단원적유한원모형여분포질량탄성체모형재계산해축전4계뉴진고유모태상적오차，가지화분13개뉴전단원적유한원모형계산오차교소，기만족공정실제중불초과5%적오차요구，우보증유교소적자유도，가이대체분포질량탄성체모형대해변속기수입축뉴진모태적계산진행리산급간화。
The torsional vibration mode of transmission input shaft equipped to a domestic car is researched. The continuous torsional vibration model of stepped shaft based on distributed mass elastic body is established and the first four torsional vibration natural frequencies and corresponding mode shape are calculated. The discrete torsional vibration model of the stepped shaft based on finite element method is established too. By comparing the finite element models of 9 and 13 torsional elements with distributed mass elastic body model on the deviation of the first four torsional vibration natural frequencies respectively, it is found that the calculated errors of finite element model with 13 torsional elements are smaller and they can be used to substitute the distributed mass elastic model to discretize and simplify the torsional vibration mode calculation of transmission input shaft since it can meet the error requirement of not exceeding 5% in engineering practice and has fewer degrees of freedom.
