本文選題：重型載貨汽車 + 減速帶��； 參考：《青島大學(xué)》2014年碩士論文

【摘要】：隨著我國車輛工業(yè)的迅速發(fā)展,車輛和交通流大幅增長,使道路交通事故頻發(fā),道路減速帶能減緩車輛的行駛速度、提高行車安全性,是減少交通事故的有效安全設(shè)施。但如果減速帶結(jié)構(gòu)及布置不合理,將會(huì)使車輛產(chǎn)生過大的振動(dòng)和沖擊力,造成車輛底盤結(jié)構(gòu)件的損傷,影響車輛的使用壽命。同時(shí),也給周邊的環(huán)境產(chǎn)生很大的噪聲污染。因此,研究分析車輛通過減速帶時(shí)的車輛沖擊荷載特性具有重要的理論意義和工程實(shí)用價(jià)值。 本文以重型載貨汽車為研究對象,運(yùn)用SIMPACK多體動(dòng)力學(xué)仿真分析軟件建立重型載貨汽車整車多體動(dòng)力學(xué)模型�；谌蔷W(wǎng)格法建立諧波疊加法激勵(lì)的冪函數(shù)功率譜密度三維路面不平度模型和道路減速帶模型。在此基礎(chǔ)上,建立三維隨機(jī)路面和道路減速帶激勵(lì)下的重型載貨汽車整車行駛動(dòng)力學(xué)模型。對重型載貨汽車通過道路減速帶時(shí)的沖擊荷載特性進(jìn)行了仿真分析與研究。 選取輪胎法向力、縱向力作為評價(jià)道路減速帶對車輛沖擊荷載特性的指標(biāo),進(jìn)行了整車以不同車速通過不同橫斷面輪廓減速帶、圓弧減速帶結(jié)構(gòu)尺寸及不同縱向坡度時(shí)輪胎法向力、縱向力的仿真計(jì)算,分析了各因素對車輛沖擊荷載特性的影響。研究結(jié)果可為道路減速帶的設(shè)計(jì)及布置提供參考依據(jù)。
[Abstract]:With the rapid development of vehicle industry in China, the increase of vehicle and traffic flow makes the road traffic accidents frequent. The road speed reducer can slow down the speed of the vehicle, improve the driving safety, and is an effective safety facility to reduce the traffic accidents. However, if the structure and arrangement of the reducer are not reasonable, the vibration and impact force of the vehicle will be too large, which will result in the damage of the chassis structure of the vehicle and affect the service life of the vehicle. At the same time, it also produces a lot of noise pollution to the surrounding environment. Therefore, it is of great theoretical significance and practical value to study and analyze the impact load characteristics of vehicles passing through the reducer. In this paper, the multi-body dynamics model of heavy-duty truck is established by using SIMPACK multi-body dynamics simulation software. Based on the triangular grid method, the power function power spectrum density 3D road roughness model and the road speed reducer model are established by harmonic superposition method. On this basis, the driving dynamics model of heavy-duty truck under the excitation of three dimensional random road surface and road speed reducer is established. The impact load characteristics of heavy-duty truck passing through the road deceleration are simulated and studied. The tire normal force and longitudinal force are selected as the indexes to evaluate the impact load characteristics of the road speed reducer, and the whole vehicle passes through the different cross section profile reducer at different speeds. Simulation calculation of normal force and longitudinal force of tire with different longitudinal slope and structure size of circular arc reducer is carried out, and the influence of various factors on impact load characteristics of vehicle is analyzed. The results can provide reference for the design and layout of road speed reducers.
【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U461;U491.5

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本文編號(hào)：2025528