海底MT探测仪器的结构可靠性设计

The built-in reliability design of marine magnetotelluric instrument

海底大地电磁探测仪器在严酷的海洋环境下工作．为保证海上作业的效率和海底探测的成功率，一方面应注意尽量小仪器的重量和体积，同时也应保证其结构的可靠．在高可靠度前提下求得最省的材料用量是本仪器系统的设计目标．根据可靠性设计理论，通过对仪器的主要结构部件进行力学验算，从抗压、抗拉、抗剪以及抗变形等技术角度确定出各结构部件的材料配置．海洋试验的结果表明，本仪器系统的结构可靠性设计方案基本合理．

The marine magnetotelluric instrument is used under rigorous seafloor conditions.In order to guarantee theworking efficiency and detecting reliability,the weight and volume of the instrument should be as small as possible,and at the same time,its built-in reliability should also be confirmed.The design aim of the instrument is to get thebest built-in reliability with a minimum design weight.Based on the reliability design theory,every part of the instru-ment is checked on mechanics,the material configuration of the instrument is determined in the light of the mechanicalparameters such as compressive strength,tensile strength,shear strength and modulus and so on.The results of ma-rine experimentation in fields indicate that the built—in reliability design of this instrument is reasonable.