The Outline Design Of Deep-water AUV System Based On Requirement Of Engineering

Autonomous Underwater Vehicle, carrying on its own energy, can complete the survey and exploration task of the setting area according to pre-determined route by different sensors. Compared with the other underwater vehicles, the AUV communicates information by acoustic communication. Without the bondage of the umbilical, the AUV has higher flexibility and a broader prospects in the long time series, large deep marine activity. The energy use efficiency is particularly important for AUV for the energy it carries is limited. The energy use efficiency, which can be improved by reducing AUV navigation resistance through reasonable shape design, directly determines the working time and distance. Especially, modern battery technology is yet to be overcome. The shape optimization design of AUV will still be a focus in the study over a longer period of time.Based on the deep-water AUV which is developed by the team, through the commercial software ANSYS, the least resistance AUV shape is designed. It can ensure the maximum energy efficiency and minimum navigation resistance of AUV system. At the same time, in order to ensure the measurement accuracy of variety of acoustic sensor on AUV, the influence of designed shape on acoustic sensors is studied in the article from a new Angle- AUV Wet Modal Analysis. The correctness of the conclusion can be validated through related to sea experiments.The main research results are as follows.1. Based on the principle of least resistance and with the aid of commercial fluid software- ANSYS, different shapes of AUV are simulated. Finally, the AUV with Myring curve shape which has much smaller resistance than other shapes is optimal linear. In the case of equal volume, to reduce the AUV resistance, the length to diameter ratio of AUV should be increased mostly.2. Through wet modal analysis for shape determined AUV system and the study of AUV frequency response in the working process, the AUV vibration influence on sensors can be avoided.3.The analysis of the related experiments verifies the correctness of the simulation results and also proves that the AUV designed meets the requirement.