中文摘要：

文章研究了有限环R—Fp＋vFp上一类任意长度的θ-常循环码的周期分布。其中v^2=v和θ=λ＋vu．利用环R上口常循环码的结构的分解，将该环上这类常循环码的周期转化成两个对应的常循环码的周期的乘积．

英文摘要：

The period distribution ofO- constacyclic codes over the finite ring R = Fp ＋ vFp of an arbitrary length is studied, where v^2 = v and θ = λ＋ vu . By decomposition of structure of θ constacyelic codes over the ring R , the period of such family of constacyclic code is converted into the product of periods of two corresponding constacyclie codes.