中文摘要：

介绍了自主研发的三维地形与疏浚绞刀仿真系统。系统用数据分块与四边形网格表示三维地形，并建立了疏浚绞刀的三维模型及其隐式曲面方程，然后用绞刀包围盒求得碰撞的四边形网格和精确的碰撞点。仿真结构表明，该方法能够满足疏浚地形的实时性要求和符合绞吸土壤产量的计算精度要求，系统计算量小，速度较快。

英文摘要：

The independent-developed 3D simulation system for terrain and cutterhead was introduced. 3D terrain was given by data partition and quadrilateral grid. The cutterhead model and its implicit equation were built and the collision of quadrilateral grid and the collided points were detected by the cutterhead box. Simulation results show that the method can meet the real-time requirement of terrain and the accuracy of the soil quantity. The system is less computational consumption and faster rapidity.