针对深潜器如何在深海中长时间工作，本文提出了悬置海洋中部构筑物的概念，阐述了该构筑物的初步使用功能及研究意义，并结合设计条件，对200和1 000 m³的球形、圆柱半球形、碟形平放和立放4种情况进行了有限元模拟和计算。结果表明：在200 m水深2 m·s^-1流速作用下，圆柱半球形构筑物加速度明显大于其余3种构筑物的加速度，其余3种构筑物在稳态时，加速度均小于5‰重力加速度，人体难以感知。球形和圆柱半球形构筑物受漩涡脱落影响明显，位移变化复杂。相同体积时碟形平放比立放加速度大，但位移小，且随着体积的增大碟形构筑物加速度值减小，但最大位移的变化幅度会增大。故可根据构筑物的使用功能具体选用合适的构筑物形状和姿态，就本文比较的构筑物而言，碟形是构筑物相对合理的姿态。

In this paper, the concept of suspended structures in the middle of the ocean is put forward, and the preliminary use function and research significance of the structure are expounded. Combined with the design conditions, the finite element simulation and calculation are carried out for four types of 200 m³ and 1 000 m³ spherical, cylindrical hemispherical, dish horizontal and vertical. The results show that the acceleration of the cylindrical hemispherical structure is obviously greater than that of the other three structures under the effect of the water depth of 200 m and the flow rate of 2 m·s^-1. The acceleration of the other three structures is all less than 5‰ of the gravity acceleration in the steady state, which is difficult for human body to perceive. Spherical and cylindrical hemispherical structures are obviously affected by vortex shedding and the displacement changes are complex. For the same volume, the acceleration of the disk-type structure is larger than that of the vertical structure, but the displacement is smaller. With the increase of the volume, the acceleration value of the disk-type structure decreases, but the variation range of the maximum displacement increases. Therefore, the appropriate structure shape and posture can be selected according to the functions of the structure. For the structures compared in this paper, the dish shape is a relatively reasonable posture of the structure.