【摘要】 粘度作为流体内部特性的关键物理量，在石油、化工、机械及核电等领域具有重要的技术应用价值。尤其在核电领域，核反应堆的冷却剂通常是水或其他液体，其粘度会受到温度和压力的影响。粘度计用于实时监测冷却剂的粘度，确保其在有效范围内，从而保持反应堆的有效冷却。该文基于振动测粘法开发一种四自由度扭转振动粘度测量系统，并对其结构优化和参数控制进行研究。通过机械阻抗法从理论上分析系统动态响应与液体粘度的关系，建立一套完善的理论模型，得到四自由度系统参数方程的解析解。该模型不仅可为粘度测量技术提供新的方法，而且在在线监测设备的设计与实际应用中展现出广泛的应用前景。更多还原

【Abstract】 Viscosity, as a fundamental property of fluids, holds significant technical value across various fields,including petroleum, chemical engineering, mechanical systems, and nuclear power. In nuclear applications,specifically, coolant fluids like water or other liquids exhibit viscosity changes influenced by temperature and pressure, impacting reactor cooling efficiency. Viscosity sensors are thus essential for real-time monitoring to ensure coolant viscosity remains within an optimal range, maintaining effective reactor cooling. This study develops a novel viscosity measurement system based on four-degree-of-freedom torsional vibration techniques, focused on structural optimization and parameter control. Utilizing the mechanical impedance method, we theoretically analyze the dynamic response of the system in relation to fluid viscosity, establishing a comprehensive theoretical model. The derived analytical solution for the four-degree-of-freedom parameter equations offers a new approach to viscosity measurement and shows promising potential for designing online monitoring devices with extensive practical applications.更多还原