一、引 言 悬索悬吊仪器、测具到水下进行水文测验,由于水流的作用将向下游移动而成一条曲线,使仪器、测具的正确位置难以确定,因而需要研究悬索曲线问题.最早提出的和最具有实际意义的是湿绳长与垂直深度的关系.利用这种关系由温绳长求垂直深度或利用垂直深度求湿绳长称为悬索的偏角改正.已经提出了一些改正公式和数表,但它们大都是经验性的,或者基于某些假设.文献[7]的结果较为例外,力学分析上较为 I. INTRODUCTION Suspension suspension equipment is used to perform underwater hydrological test. Due to the effect of water flow, a curve will be moved downstream to make it difficult to determine the correct position of the instrument and the measuring tool. Therefore, it is necessary to study the suspension cable curve problem. The earliest and most significant is the relationship between the length of the wet rope and the vertical depth.Using this relationship, the vertical depth is obtained from the length of the warm rope or the vertical angle of the wet rope is called the suspension rope. Some correction formulas and tables, but most of them are empirical, or based on certain assumptions. [7] the results are more exceptional, more mechanical analysis