尖轨不足位移随滑床板摩擦系数的增加而增大，基本成线性递增关系；
On the whole, it grows with the increase of friction modulus linearly.
随着列车提速和客运专线的建设，道岔的设计也由静态设计向动态设计转变，弹性可弯尖轨及心轨的扳动力及不足位移是道岔设计中的关键问题。
The model of switch calculated is built aiming to number 42 double arm elastic bending point rail, system analysis is made for switching force and inadequate displacement.
但目前土钉支护结构的设计分析方法仍不够完善，对其可靠性、变形位移计算的研究也很不足。
But the method of its design analysis is not perfect yet, and the study on its reliability, deformation and displacement is also very poor.
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