Abstract：Research purposes: The UIC is responsible for drawing up the universal and basic international codes or the international codes of the basic interface involving in a number of professions for its member countries，including product codes and interchange service codes． The UIC gauge code is one of the universal interchange service codes，so it is very important to correctly understanding the UIC gauge code． The most importantly understanding the UIC gauge code is to understand the basis Kinematic guage reference profile，but now there is no the corresponding concept in the chinese railway codes． The study on the UIC codes presented in this paper has a certain reference significance to the correct understanding UIC codes and has a certain guiding effect on improving the standard system of China high － speed railway and speeding up implementation of the strategy of " Going out" ．
Research conclusions: The UIC gauge code is very different from China in concepts． The UIC Kinematic guage reference profile is provided as the fixed value，and is used for defining the manufacturing clearance of rolling stock and the profile clearance of the wayside building along the track． But in China railway codes，thees two ones are the fixed values in accordance with requirement to inverse the " vehicle dynamic envelope" ． So the China railway code should be improved and the specific design parameters should tend to more basic theory，basic principles and the calculation process with new ideas to maintain design flexibility and operability．
雷中林. UIC 标准限界及相关问题计算研究[J]. 铁道工程学报, 2011, 28(8): 121-125.
LEI Zhong － lin. Research on Calculations of UIC Gauge Code and Its Relative Issues. 铁道工程学报, 2011, 28(8): 121-125.
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2011, Vol. 28 
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