汽车实用技术
汽車實用技術
기차실용기술
PRACTICAL TECHNOLOGY OF AUTOMOBILE
2012年
4期
46-49
,共4页
前轮摆振%非线性动力学%间隙%Hopf分岔
前輪襬振%非線性動力學%間隙%Hopf分岔
전륜파진%비선성동역학%간극%Hopf분차
vehicle shimmy%nonlinear dynamics%clearance%Hopf bifurcation
在经典三自由度前轮摆振模型的基础上,基于非线性动力学理论,建立了考虑万向节运动副间隙的三自由度摆振模型。利用Poincare截面法绘制了车轮摆角幅值随车速变化的分岔特性曲线,分析了车速变化引起的某非独立悬架汽车前轮自激摆振的Hopf分岔,验证了在特定车速范围内发生自激励摆振的运动特性。
在經典三自由度前輪襬振模型的基礎上,基于非線性動力學理論,建立瞭攷慮萬嚮節運動副間隙的三自由度襬振模型。利用Poincare截麵法繪製瞭車輪襬角幅值隨車速變化的分岔特性麯線,分析瞭車速變化引起的某非獨立懸架汽車前輪自激襬振的Hopf分岔,驗證瞭在特定車速範圍內髮生自激勵襬振的運動特性。
재경전삼자유도전륜파진모형적기출상,기우비선성동역학이론,건립료고필만향절운동부간극적삼자유도파진모형。이용Poincare절면법회제료차륜파각폭치수차속변화적분차특성곡선,분석료차속변화인기적모비독립현가기차전륜자격파진적Hopf분차,험증료재특정차속범위내발생자격려파진적운동특성。
Based on nonlinear dynamics, a tree-DOF dynamic model for vehicle shimmy was established, which considered the clearance of universal joint movement. Through Poinca6 mapping method, the Bifurcation characteristic curve of wheel pivot angle amplitude was plotted. Considering the self-excited shimmy which caused by the movement of rigid axle suspension under varied speeds, the Hopf bifurcation was discussed. The results verify the motion characteristic of self-excited shimmy, which under specific rang of speed.
