典型輪胎非均勻接觸應(yīng)力獲取及其作用下的路面TDC開裂分析
發(fā)布時間：2018-12-27 13:55
【摘要】：我國的瀝青路面設(shè)計(jì)規(guī)范采用雙圓均布靜態(tài)荷載來假定車輛荷載,忽略了車輛荷載分布的非均勻性,而將瀝青路面假設(shè)為多層彈性體系,忽略了瀝青路面的粘彈性。同時,隨著瀝青上面層的不斷增厚,瀝青路面的TDC開裂不斷增多,因此,需要研究胎路作用的接觸對于TDC開裂所具有的影響。首先,基于ABAQUS軟件,考慮輪胎的組成材料的本構(gòu)關(guān)系、輪胎簾布的各向異性以及輪胎變形的非線性,分析材料屬性方向、輪胎網(wǎng)格劃分以及接觸屬性等對于輪胎有限元模型收斂性的影響。其次,基于ABAQUS/Explicit隱式動態(tài)分析,分析輪胎的速度與加速度對于輪胎的三向接地應(yīng)力(豎向接地應(yīng)力、橫向接地應(yīng)力、縱向接地應(yīng)力)的影響,研究不同花紋、不同胎壓、不同荷載的輪胎在不同工況下的三向接地應(yīng)力分布以及最大值的關(guān)系,并通過實(shí)測相驗(yàn)證。接著,通過ABAQUS后處理輸出程序,提取復(fù)雜花紋輪胎與剛性路面在不同運(yùn)動工況下(牽引工況、自由滾動工況以及制動工況)的的三向接地應(yīng)力并建立某種典型的瀝青粘彈性路面模型,該模型包含有上面層、中面層、下面層、半剛性基層以及土基層。通過ABAQUS DLOAD子程序?qū)⑻崛〉娜蚪拥貞?yīng)力作用于瀝青路面模型上,考慮影響瀝青路面TDC開裂病害的力學(xué)因素,分析瀝青路面在復(fù)雜花紋輪胎荷載作用下,不同運(yùn)動工況上面層三向應(yīng)力分布情況。分析結(jié)果表明,輪胎的制動和牽引會影響瀝青路面的TDC開裂,主要影響指標(biāo)是縱向剪切應(yīng)力。最后,以瀝青路面TDC開裂的受力分析為基礎(chǔ),分析路面各層位移、應(yīng)變、應(yīng)力響應(yīng)情況。
[Abstract]:The design code of asphalt pavement in our country assumes the vehicle load by double circular uniform static load and neglects the non-uniformity of vehicle load distribution. The asphalt pavement is assumed to be a multi-layer elastic system and the viscoelasticity of asphalt pavement is neglected. At the same time, with the continuous thickening of the asphalt layer, the TDC cracking of asphalt pavement is increasing. Therefore, it is necessary to study the effect of the contact of the tread on the TDC cracking. First of all, based on ABAQUS software, considering the constitutive relation of tire material, the anisotropy of tire cord and the nonlinearity of tire deformation, the material property direction is analyzed. The effects of tire mesh generation and contact properties on the convergence of tire finite element model. Secondly, based on the implicit dynamic analysis of ABAQUS/Explicit, the effects of tire speed and acceleration on the three direction ground stress (vertical ground stress, transverse ground stress, longitudinal ground stress) of tire are analyzed, and different patterns and tire pressures are studied. The relationship between the distribution of three-way ground stress and the maximum value of tire under different loads is verified by the measured results. Then, through the ABAQUS post-processing output program, the complex pattern tire and the rigid pavement are extracted under different moving conditions. A typical model of asphalt viscoelastic pavement is established, which includes upper layer, middle surface layer, lower layer, semi-rigid base and soil base. Through ABAQUS DLOAD subroutine, the extracted three-way ground stress is applied to the asphalt pavement model. Considering the mechanical factors affecting the TDC cracking of asphalt pavement, the paper analyzes the asphalt pavement under the complex pattern tire load. Three dimensional stress distribution of the upper layer under different moving conditions. The results show that the braking and traction of tire will affect the TDC cracking of asphalt pavement, and the main index is longitudinal shear stress. Finally, based on the stress analysis of asphalt pavement TDC cracking, the displacement, strain and stress response of each layer of asphalt pavement are analyzed.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.217
本文編號：2393172
[Abstract]:The design code of asphalt pavement in our country assumes the vehicle load by double circular uniform static load and neglects the non-uniformity of vehicle load distribution. The asphalt pavement is assumed to be a multi-layer elastic system and the viscoelasticity of asphalt pavement is neglected. At the same time, with the continuous thickening of the asphalt layer, the TDC cracking of asphalt pavement is increasing. Therefore, it is necessary to study the effect of the contact of the tread on the TDC cracking. First of all, based on ABAQUS software, considering the constitutive relation of tire material, the anisotropy of tire cord and the nonlinearity of tire deformation, the material property direction is analyzed. The effects of tire mesh generation and contact properties on the convergence of tire finite element model. Secondly, based on the implicit dynamic analysis of ABAQUS/Explicit, the effects of tire speed and acceleration on the three direction ground stress (vertical ground stress, transverse ground stress, longitudinal ground stress) of tire are analyzed, and different patterns and tire pressures are studied. The relationship between the distribution of three-way ground stress and the maximum value of tire under different loads is verified by the measured results. Then, through the ABAQUS post-processing output program, the complex pattern tire and the rigid pavement are extracted under different moving conditions. A typical model of asphalt viscoelastic pavement is established, which includes upper layer, middle surface layer, lower layer, semi-rigid base and soil base. Through ABAQUS DLOAD subroutine, the extracted three-way ground stress is applied to the asphalt pavement model. Considering the mechanical factors affecting the TDC cracking of asphalt pavement, the paper analyzes the asphalt pavement under the complex pattern tire load. Three dimensional stress distribution of the upper layer under different moving conditions. The results show that the braking and traction of tire will affect the TDC cracking of asphalt pavement, and the main index is longitudinal shear stress. Finally, based on the stress analysis of asphalt pavement TDC cracking, the displacement, strain and stress response of each layer of asphalt pavement are analyzed.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.217
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 戴元坎,俞淇;輪胎接觸問題的分析與研究[J];輪胎工業(yè);1997年03期
相關(guān)碩士學(xué)位論文 前1條
1 應(yīng)卓凡;子午線輪胎的剛度特性和制動摩擦力的三維有限元分析[D];華南理工大學(xué);2010年
，本文編號：2393172
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