Structure Optimization And Strength Analysis Of The Underwater Robot

In recent years, with the rapid development of computer technology, the finite element method has been a very wide range of applications in structural engineering strength analysis. On the basis of ensuring the accuracy of analysis, if this paper uses the finite element analysis software ANSYS to conduct structural analysis and optimization, it can not only extend the life of the underwater robot, but also shorten the development cycle and reduce development costs. This paper focuses on the research of the underwater robot's structural optimization and analysis based on a combination of the method of finite element and the theoretical analysis. Main contents are as follows.(1) Based on the preliminary model of the main sail body provided by the enterprises, this paper uses the APDL language of finite element analysis software ANSYS to set up parametric model. Since the structural strength of the initial model is not satisfied, it proposes three different optimization schemes. Then, under the conditions to meet the strength and stiffness of the structure, this paper uses the finite element analysis software ANSYS to optimize the structure by adjusting the cabin rib size, frame spacing and ribs structure and then give the optimization proposal.(2) In accordance with the recommendations put forward, machining requirements and the actual situation the enterprise gives the new model. Based on the finite element and theoretical analysis method, take full account of all conditions, this paper conducts a comprehensive structural analysis of the underwater robot.(a) The strength analysis of the underwater robot under the deep-sea conditionsThis paper uses the finite element analysis software ANSYS to write APDL language and conduct the compressive strength analysis and the buckling analysis of the underwater robot's pressure resistance cabin. Then, get the corresponding stress distribution and the frequency values of buckling. Thus, check their strength and standardize in accordance with the submersible standardize.(b) The strength analysis of the underwater robot under the ocean wave conditionsTaking into account the risk of underwater robots state wave conditions, using theoretical calculation method to calculate the wave loads under sea conditions of level 5 and get wave torque of level 5. To fully consider the strength of the underwater robot under the ocean wave conditions, it is divided into seakeeping analysis of the main underwater vehicle and bolt groups connected by each the cabin group.Based on this, analyze and check the strength of main underwater vehicle and bolt groups connected by each the cabin group by the finite element analysis software ANSYS and the theoretical analysis method.Then, this paper uses the finite element analysis software ANSYS to write APDL language and conduct the modal analysis of the underwater robot in order to avoid the resonance and give the corporate information.(c) The strength analysis of the underwater robot under the lifting conditionsThe lifting assembly and mount components of underwater robot is distributed in cabin 4 cabin 5, so calculate the load of cabin 4 and cabin 5 under the lifting conditions. First, this paper uses the finite element analysis software ANSYS to write APDL language and conduct the lifting strength analysis and the flank strength analysis of cabin 4 and cabin 5 and then get the corresponding stress distribution. Then, in accordance with the acceptance criteria check the strength based on this data. Furthermore, analyze and check the strength of bolt groups connected by each the cabin group by the theoretical analysis methods.This paper has been optimized and given a very comprehensive structural analysis for the underwater robot. The above analysis results provide a powerful help for the structural design of underwater robot.