汽车科技
汽車科技
기차과기
QICHE KEJI
2014年
1期
5-10
,共6页
王鹏%魏道高%潘之杰%肖怀阳
王鵬%魏道高%潘之傑%肖懷暘
왕붕%위도고%반지걸%초부양
三轮汽车%自激摆振%极限环%分岔
三輪汽車%自激襬振%極限環%分岔
삼륜기차%자격파진%겁한배%분차
three-wheeled vehicle%shimmy%limit cycle%bifurcation
为获得转向柱后倾角对三轮汽车摆振影响,以国产某型三轮汽车作为样车,对其转向系统进行了简化,建立了二自由度前轮摆振系统动力学模型。基于以上模型,运用数值计算方法,得到了随车速变化的前轮摆振系统振动特性及转向柱后倾角变化对其的影响。结果表明,减小转向柱后倾角,能有效减小三轮汽车前轮自激摆振的速度区间。而当车速较高,前轮摆振系统发生自激振动时,减小转向柱后倾角能有效地降低前轮自激摆振极限环幅值和频率,甚至消除自激摆振现象。
為穫得轉嚮柱後傾角對三輪汽車襬振影響,以國產某型三輪汽車作為樣車,對其轉嚮繫統進行瞭簡化,建立瞭二自由度前輪襬振繫統動力學模型。基于以上模型,運用數值計算方法,得到瞭隨車速變化的前輪襬振繫統振動特性及轉嚮柱後傾角變化對其的影響。結果錶明,減小轉嚮柱後傾角,能有效減小三輪汽車前輪自激襬振的速度區間。而噹車速較高,前輪襬振繫統髮生自激振動時,減小轉嚮柱後傾角能有效地降低前輪自激襬振極限環幅值和頻率,甚至消除自激襬振現象。
위획득전향주후경각대삼륜기차파진영향,이국산모형삼륜기차작위양차,대기전향계통진행료간화,건립료이자유도전륜파진계통동역학모형。기우이상모형,운용수치계산방법,득도료수차속변화적전륜파진계통진동특성급전향주후경각변화대기적영향。결과표명,감소전향주후경각,능유효감소삼륜기차전륜자격파진적속도구간。이당차속교고,전륜파진계통발생자격진동시,감소전향주후경각능유효지강저전륜자격파진겁한배폭치화빈솔,심지소제자격파진현상。
In order to get the influence of the steering column caster on the front wheel shimmy of the three-wheeled vehicle, a domestic three-wheeled vehicle as the prototype was simplified. And the dynamic model of the front wheel shimmy system of two degree of freedom was established. The vibration characteristics of the front wheel shimmy system changing with the velocity and the effects on it of the steering column caster were got by numerical calculation. The results show that the shimmy velocity range of the front wheel of three-wheeled vehicle reduces with the decrease of the caster. When the shimmy occurs with high velocity, increasing the caster will reduce the amplitude and the frequency of the shimmy or even eliminate the shimmy phenomenon.