该文提出一种半解析半数值的分析方法，对汽车轮辋挡圈的冷弯过程进行了分析。

This paper put forward a semi-analytic semi-numeric method to analyze the cold bending of the hubcap.

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根据大气阻力摄动的基本原理，给出两种摄动计算方法，即半分析半数伍方法和数值积分方法。

On the basis of the principle of atmospheric drag perturbation this paper describes two methods: numerical method and combining both of analytical and numerical method.

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同时，在此基础上给出半分析半数值方法的基本公式。

Then fundamental formulae of semi-analytical and seminumerical method are deduced on the basis of the works mentioned above.

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