【作者】 史春雪；

【导师】 朱福民； 李万莉； 罗云飞；

【作者基本信息】 长沙理工大学 ， 机械设计及理论， 2005， 硕士

【摘要】 近年来,我国沥青混凝土路面高等级公路的发展状况日新月异。但是,在沥青路面施工中,沥青混合料的温度离析情况一直发生。在自卸车从拌和站出发运送沥青混合料到达施工现场的过程当中,车上的沥青料就随着时间的延续,发生着温度的离析。本文以有限元方法为工具,对自卸车运送中的沥青混合料的温度场进行仿真,不但从质上,而且从量上对沥青混合料的温度离析情况进行分析,围绕仿真的情况,本文主要开展了以下几个方面的工作: 1. 分析自卸车运送中沥青混合料温度离析产生的原因,并将各种原因按照有限元方法,作为热学载荷施加到仿真模型当中。2. 按照有限元分析中常见的面单元法,建立仿真的模型,并对常温施工环境,低温施工环境和高温施工环境三种情况分别进行仿真。3. 通过仿真分析的结果,包括模型温度场图形、节点温度变化曲线和节点的温度值,对结果进行初步的分析,建立三种环境的仿真结果的关系,并通过比较确立温度离析的决定性因素。4. 按照已经完成的仿真,对自卸车侧板处的沥青混合料的温度变化情况进行函数编制,并对已经编制的三组函数进行整合。5.按照在实际的施工现场采样得来的数据,对降温函数进行验证,通过验证的结果证明,满足工程和程序编制的要求。更多还原

【Abstract】 In resent years, the development of high-grade asphalt concrete road surface is changing with each passing day. But, in working on the asphalt road surface, the conditions that temperature isolation always happened. In the duration that tip truck transport asphalt concrete from the mixing chamber to the construction location, followed with the time goes on, the asphalt concrete will occur the temperature isolation. The thesis uses the tool of finite element method to carry on the simulation test on the temperature field of the asphalt concrete that in the midway of the transportation by tip truck. The analysis on the temperature isolation of asphalt concrete is not only on the quality, but also on quantity. Based on the simulation condition, the thesis carries on the following aspects work: 1. Analysis the reason that the asphalt concrete occurs temperature isolation in the midway of transportation by tip truck, and according to the method of finite element method take each kind of reason as thermal burden adds into the simulation model. 2. Establish simulation model according to the surface unit method, that often used in the finite element method, and carry on simulation test on construction environment at normal temperature, low temperature and high temperature separately. 3. Give preliminary analysis on the result of simulation test that include the model graph of temperature field, curved line of node temperature and node temperature. Establish the relation of simulation results in three kinds of temperature, and confirm the definitude factor that lead to temperature isolation by compare. 4. According to the completed simulation test, draw up function on the temperature change condition of asphalt concrete in the side board of tip truck, and carry on conformity to the three group function. 5. To test and verify the drop-temperature function by the date which received from sampling in construction location. The proven result proves that the functions satisfy the demand both in engineering and programming.更多还原