水下监测平台动态特性计算模型及影响因素分析

Computation Model and Analysis of Influencing Factors for Underwater Monitoring Platforms Dynamic Characteristic

摘要: 论文针对水下监测平台动力学特性问题，利用流场中结构振动模态的有限元计算方法及微元法的思想，考虑了流体对结构动态特性的影响，建立了水下监测平台浮体在流体的拖曳力、流体的垂直升力、浮力作用下的计算模型。通过数值分析方法，探讨了水下监测平台浮体固有频率的影响因素，通过对影响因素的调整，可以使浮体结构的固有频率远离水流漩涡释放频率，有效地减小共振给监测平台带来的危害，对水下监测平台的设计具有十分重要的意义。

Abstract: The paper aimed at the dynamic characteristic of underwater monitoring platform, which endured drag force, normal lift along flow and buoyancy, and taken into account the influence of flow force to structures dynamic characteristic, the computational model was formulated with the finite computing method of structure vibration modal on flow field and infinitesimal method idea. The influencing factors were discussed for natural frequency of underwater monitoring platform by numerical analysis method. Natural frequency of buoy was far from the vortex release frequency by adjusting the influencing factors. This method can effectively decrease the vibration by resonance and it has important implications to design the underwater monitoring platform.