Delay tolerant networks may become unexpectedly partitioned due to node mobility or variationin signal strength. However, most widely used models insome relative works are generally very simplistic. In orderto exploit intelligent forwarding algorithms, a novel nodalmobile model of delay tolerant networks is presented tomap reality with more accuracy. And several approachesare introduced to analyze the network structure, such asn-cliques, n-clans, degree, closeness and betweenness. Ourresearch results showed that the centralizations becamesmaller when the wireless connections were concerned. Itmeant that quite a number of nodes became potential relays because of the new structure of networks.