轨道底面与地面必须紧密着力，不得有虚跨间隙，以防止地轨轨道载荷后弯曲变形。
Orbital floor and must closely focus on the ground, in order to prevent the ground rail track bending deformation after loading.
本文从引入虚元的热弹性板元有限元计算和试验测定两方面分析研究了平板堆焊时平面外变形的形态及产生机制。
In present paper, the form and mechanism of formation of out-of-plane distortion during bead-on-plate welding was studied by thermal clastic analysis with introduction of dummy element and experiment.
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