投弃式波流测量传感器浮标体结构分析及伪刚体建模研究

Structural Analysis and Pseudo-Rigid-Body Modeling of an Expendable Wave-Measuring Sensor Buoy

根据投弃式波流测量传感器的功能及应用特点,提出了其浮标体的结构设计要求,并依此给出了所设计浮标体的主体结构。文中描述了所设计的投弃式波流测量传感器浮标体各部分的结构功能,论证了该浮标体在投弃式波流测量方面的结构优势。共研究了所设计的3种不同投弃式波流测量传感器浮标体结构,包括两种采用柔性浮力叶片的浮标体和一种采用刚性浮力叶片的浮标体。根据柔顺机构学理论分别建立了其中两种柔性浮标体的伪刚体模型。对比了刚性浮标体和两种柔性浮标体的伪刚体模型在波浪海流作用下的姿态特点,分析了各浮标体在波高测量时的误差原因,得出了其中C型柔性浮标体具有更好的随波浪和海流运动响应的结论。为更深入地进行投弃式波浪测量传感器浮标体运动学和动力学的相关研究提供了模型基础。

Based on the function and application environment of the expendable wave-measuring sensor, the structural design requirements of its buoy and the main body structure of the buoy are presented in this paper, with the functions of all major parts of the buoy described in a detailed way. The structural superiority of the buoy is also demonstrated in the aspect of expendable wave measuring. Three kinds of buoys are designed and studied, including two buoys equipped with flexible buoyant blades and one buoy with rigid buoyant blades. The pseudo-rigid-body models of two flexible buoys are respectively established according to the Compliant Mechanism Theory. This paper provides a comparison of the model attitudes of two flexible buoys and a rigid buoy under the effects of waves and currents, analyzes the reason of errors in wave height measurement for all buoys, and reaches the conclusion that the type-C flexible buoy has a better response with the motion of waves and currents, which offers the model base for studying the kinematics and dynamics of expendable wave-measuring buoys in an in-depth manner.