基于顆粒流程序的ATB-30下面層細觀響應研究
發(fā)布時間：2019-03-25 15:11
【摘要】：為了研究ATB-30下面層在荷載作用下的細觀響應,利用顆粒流程序生成ATB-30下面層的細觀模型,在施加標準軸載后,追蹤了細觀模型顆粒間接觸力的演化、不同位置處顆粒的位移。模擬結(jié)果表明:顆粒間接觸力的大小不同、延伸方向各異,較大的顆粒間形成較大的接觸力,施加荷載前模型的最大接觸力為7.051×104 N;荷載作用后,ATB-30細觀模型的最大接觸力為1.393×105 N,比未施加荷載時增加了約1.98倍,接觸力的分布在輪胎下方較密集,且接觸力較大;沿深度方向顆粒的位移逐漸減小,兩輪輪隙處顆粒的位移明顯小于左右輪中間處的顆粒,并且左右輪中間處顆粒產(chǎn)生的位移相差不大,最大差異出現(xiàn)在深度為0.04cm處,兩者僅相差0.28mm。
[Abstract]:In order to study the mesoscopic response of the lower layer of ATB-30 under load, the mesoscopic model of the lower layer of ATB-30 is generated by the particle flow program. After the standard axial load is applied, the evolution of the indirect contact force of the particle in the mesoscopic model is tracked. Displacement of particles at different locations. The simulation results show that the size of indirect contact force of particles is different, the extension direction is different, the larger particles form a larger contact force, the maximum contact force of the model before loading is 7.051 脳 10 ~ 4 N; After loading, the maximum contact force of the ATB-30 mesoscopic model is 1.393 脳 10 ~ 5 N, which is about 1.98 times higher than that of the non-loading model. The distribution of the contact force is denser under the tire, and the contact force is larger. The displacement of particles in the depth direction decreases gradually, the displacement of particles in the gap between the two wheels is obviously smaller than that in the middle of the left and right wheels, and the displacement produced by the particles in the middle of the left and right wheels is not much different, and the maximum difference appears at the depth of 0.04cm. The difference between them is only 0.28 mm.
【作者單位】： 長安大學公路學院;內(nèi)蒙古路橋有限責任公司;
【基金】：中國博士后科學基金(2014M550476) 國家自然科學基金(51408047)
【分類號】：U416.2
本文編號：2447082
[Abstract]:In order to study the mesoscopic response of the lower layer of ATB-30 under load, the mesoscopic model of the lower layer of ATB-30 is generated by the particle flow program. After the standard axial load is applied, the evolution of the indirect contact force of the particle in the mesoscopic model is tracked. Displacement of particles at different locations. The simulation results show that the size of indirect contact force of particles is different, the extension direction is different, the larger particles form a larger contact force, the maximum contact force of the model before loading is 7.051 脳 10 ~ 4 N; After loading, the maximum contact force of the ATB-30 mesoscopic model is 1.393 脳 10 ~ 5 N, which is about 1.98 times higher than that of the non-loading model. The distribution of the contact force is denser under the tire, and the contact force is larger. The displacement of particles in the depth direction decreases gradually, the displacement of particles in the gap between the two wheels is obviously smaller than that in the middle of the left and right wheels, and the displacement produced by the particles in the middle of the left and right wheels is not much different, and the maximum difference appears at the depth of 0.04cm. The difference between them is only 0.28 mm.
【作者單位】： 長安大學公路學院;內(nèi)蒙古路橋有限責任公司;
【基金】：中國博士后科學基金(2014M550476) 國家自然科學基金(51408047)
【分類號】：U416.2
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1 武軍;廖少明;張迪;;基于顆粒流橢球體理論的隧道極限松動區(qū)與松動土壓力[J];巖土工程學報;2013年04期
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