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为计算磁悬浮轨道异形截面箱梁在日大气环境下的微挠度,运用ANSYS对轨道梁进行24h瞬态分析。基于热学理论和边界条件的确定,考虑轨道梁不同走向的影响,采用热瞬态分析的技术,实现任意时刻箱梁结构温度场的仿真。以上海磁悬浮轨道梁为例,进行了预应力异形温度场的数值仿真,验证梁是否满足温度变形限值,提出梁设计建议,并以最不利时刻的温度场为依据,提出了此种截面箱梁的温度梯度分布模式。
In order to calculate the micro-deflection of a box girder with magnetic suspension orbit in the daily atmospheric conditions, the transient analysis of the girder was performed by ANSYS for 24h. Based on the thermal theory and the determination of the boundary conditions, considering the influence of the different directions of the track beam, the thermal transient analysis technique is used to simulate the temperature field of the box girder structure at any moment. Taking Shanghai Maglev Track Beam as an example, the numerical simulation of the pre-stress profiled temperature field is carried out to verify whether the beam satisfies the temperature deformation limit and propose the beam design proposal. Based on the most unfavorable moment temperature field, Beam temperature gradient distribution mode.