中文摘要：

基于离散化思想编制了对已知材质分布的两栖车水线面位置的近似求解程序，程序先将车辆覆盖区域划分为多个子单元，积分求解车辆的质量与排水体积，根据空间点力系等效原理，按照逐步迭代逼近的思路，进而求出车辆的质心、浮心坐标和水线位置。最后利用该工具对所研究两栖车水线面位置在假定材质均匀分布的极端情况下进行了计算，分析表明尽管存在一定误差，但计算结果能够满足后期的流场计算需求。

英文摘要：

Based on discretizational idea, a solver was programmed for confirming position of waterline on amphibious vehicle with known distribution of material. The domain covered by vehicle was divided into many cells to compute mass and tonnage through the integral thought. Center of mass, center of buoyancy and position of waterline were also resolved based on equivalent theory of dimensional vector force system and the thought of iteration approach. The program was used on one vehicle under extreme condition assuming homogeneous distribution of material. Comparison between computational data and measured data shows that the result is precise enough for later computation of flow field.