Graincad Systems Design Development And Research

This paper describes a new computer program(RegressSD) to simulate the regression of complex 3_D grain cavity and calculate the burning surface area . It has a large region of application in solid rocket motor grain design and has made new improvements compared with other available codes. User can easily and rapidly build his initial grain shapes and then obtain geometric information of his design. According to the theory describeds in the paper, the regressions of the burning surface area and the pressure are obtainded. Considering with the calculating results,redesigning can be performed as desire until reaching at the satisfied result.Moreover, the paper describes the design of several kinds of popular grains , for instance: monotramonous grain and starlike grain, and obtains computer program. It offers more convenient approach.With grain design and the calculations of pressure --- timeand thrust ?time, the designers of rocket can improve their structure design.