The topological characteristics graph of flow is derived by means of topological analysis method.通过拓扑分析的方法，给出了横流中有限宽窄缝射流旋涡近区流场的拓扑性质。
Then a simple light-truck-body model for topological analysis was built and the topological results were used in simpliz根据对车身简化模型拓扑优化的结果，对轻卡车身的加强筋布置提出了建议。