摘要
应用全局矩阵法,推导了多层结构壳体的导波频散方程,并分别针对固体火箭发动机四种不同层数的壳体导波频散曲线进行了求解,发现当结构层数和第一层厚度增加时,各模式曲线的间隔缩小,曲线数目增加,并有向零频方向靠拢的趋势。同时研究了粘接质量变化对频散特征的影响,随着胶层质量相对变差,频散曲线总体向左漂移。
It is an efficient method to detect multi-layered structure of solid rocket motor by guided wave. This paper made use of global matrix method, inferred the dispersion equation of mul- ti-layered structure shell. The dispersion curve of four different layer＇s quantity of shell structures are computed. It shows that with the increase of layer＇s quantity and the first layerls thickness, the distance between different model curve will decrease, the curvets quantity will increase, the curves are totally close to zero frequency. This paper also studied the influence of glue layer＇s quality on dispersion curve. It is found that the curves shift to left when the glue layer goes to bad.
出处
《火箭推进》
CAS
2008年第5期16-21,共6页
Journal of Rocket Propulsion
关键词
固体火箭发动机
多层结构
导波
频散曲线
solid rocket motor
multi-layered structure
guided waves
dispersion curve
