自返式微型地热探针水下运动及贯入特性分析

Analysis of underwater motion characteristics and penetration characteristics of mini heat flow probe

自返式微型地热探针水下运动特性以及其贯入深度关系到其能否正常入泥工作,针对自返式微型地热探针的结构,对其进行简化,建立物理模型。并针对海洋流场及海洋底质,抽取关键参数,建立探针投放过程中的流场模型和底质模型。将所建立模型导入数据分析软件,先分析探针在投放过程中竖直方向和水平方向的相关运动特性,然后拟合为探针下行过程中下行深度和横向漂移的轨迹图,可见其水平方向最大位移约为106 m。在理论上论证了探针在下行过程中的姿态稳定性。通过计算论证了自返式微型探针在依靠自身重力的情况下,自动贯入海底沉积物进行热流测量工作方式的可行性。并在最后通过海上试验,对分析结果进行了实践验证。

The underwater movement characteristics and depth of penetration of mini heat flow probe are related to its normal work into the mud. The structure of the mini heat flow probe is simplified and the physical model is established. And for the ocean flow and marine sediment,the key parameters are extracted,and the model of the probe flow process and the sediment is established. Data analysis software is introduced,and the relevant motion characteristics of the probe in the vertical and horizontal directions during the process are analyzed. Then,the trajectory of the downstream depth and the lateral drift in the downstream of the probe is fitted,and the maximum displacement in the horizontal direction is found to be about 106 m. In this paper,the attitude stability of the probe in the downstream process is proved theoretically. It is proved that the self-starting miniature probe can automatically penetrate the seabed sediments to study the working mode of heat flow measurement in the case of its own gravity. And finally through the sea test,the results of the analysis are rerified.