【摘要】：操縱穩(wěn)定性是自卸車安全高效運輸?shù)闹匾ＷC,影響其的因素較多,正確建立分析模型是研究影響因素的重要前提。結(jié)合自卸車所采用的油氣懸架系統(tǒng)的結(jié)構(gòu)和性能特征,基于多剛體動力學(xué)法,建立4自由度某自卸車的動力學(xué)模型和數(shù)學(xué)模型。在時不變輸入狀態(tài)下,采用穩(wěn)定性理論分析,判斷整車系統(tǒng)具有穩(wěn)定性的條件�；谒罱ǖ恼嚩囿w動力學(xué)模型,整車在滿載與空載時,對車輛簧載質(zhì)量質(zhì)心位置、軸距、懸架系統(tǒng)參數(shù)等主要結(jié)構(gòu)參數(shù)變化時,各狀態(tài)參數(shù)的響應(yīng)進(jìn)行分析,獲得主要參數(shù)變化對整車操縱穩(wěn)定性的影響。由分析結(jié)果可知:當(dāng)簧載質(zhì)量質(zhì)心越靠近前軸時越有利于提高操縱穩(wěn)定性;側(cè)傾軸線與簧載質(zhì)量質(zhì)心的高度對質(zhì)心側(cè)向速度與橫擺角速度影響較小;懸架的剛度對整車質(zhì)心處的側(cè)向速度和橫擺角速度的影響較小;相同條件下,應(yīng)該選擇軸距較長的設(shè)計;車輛前懸架剛度取值越小,而后懸架取值越大,則車輛穩(wěn)態(tài)轉(zhuǎn)向時,簧載質(zhì)量的側(cè)傾角越小;簧載質(zhì)量質(zhì)心越靠前越有利于提高車輛的操縱穩(wěn)定性;所采用的研究方法和獲得的研究結(jié)果為此類設(shè)計提供參考。
[Abstract]:The handling stability is an important guarantee for the safe and efficient transportation of dump truck, and there are many factors affecting it. It is an important prerequisite to study the influencing factors to set up the analysis model correctly. Based on the multi-rigid body dynamics method, a dynamic model and a mathematical model of a 4-DOF dump truck are established based on the structure and performance characteristics of the hydro-pneumatic suspension system used in the dump truck. In the state of time-invariant input, the stability theory is used to judge the stability condition of the whole vehicle system. Based on the multi-body dynamic model of the whole vehicle, the response of each state parameter is analyzed when the mass center of spring load, wheelbase, suspension system parameter and other main structural parameters of the vehicle are changed when the vehicle is under full load and no load, such as mass center position, wheelbase, suspension system parameters and so on. The influence of the main parameters on the handling stability of the whole vehicle is obtained. The results show that: the closer the spring mass center is to the front axle, the better the handling stability is, and the influence of the height of the roll axis and the spring mass center on the lateral velocity and the yaw angular velocity of the mass center is small. The stiffness of suspension has little effect on the lateral velocity and yaw angular velocity at the center of mass of the whole vehicle, under the same conditions, the design with longer wheelbase should be selected. The smaller the stiffness of the front suspension and the greater the value of the rear suspension, the smaller the lateral angle of the spring mass, the more forward the mass center of the spring load is, the better the handling stability of the vehicle is. The research methods and results obtained provide reference for this kind of design.
【作者單位】： 宿遷學(xué)院機(jī)電工程系;
【基金】：宿遷市指導(dǎo)性科技計劃項目(Z201530);(Z201536) 宿遷學(xué)院科研基金項目(2016 ky28) 江蘇高校品牌專業(yè)建設(shè)工程資助項目(PPZY2015C252)
【分類號】：TH24

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