Optimal Design, Based On Finite Element Analysis Of The Torpedo Tail Section

As a part of torpedo, torpedo trail plays the great important role on controlling move direction and bringing thrust in the process of torpedo operation.In order to reach the high speed and cover of torpedoe, the intensity and rigidity of torpedo trail is very important. The analysis of the stiffness characteristics of torpedo trail is the guidance of people for further optimization of torpedo structure and further analysis of response of stiffness characteristic.As an important quality index,the dynamic specialty determines the security and efficiency With the famous FEM software ANSYS,the finite element model of the whole torpedo trail structure was built according to its character and work conditions,and then the vibration characteristics (natural frequencies and mode shapes)of the structure was determined applying model analysis.It also can be a starting point for another, more detailed,dynamic analysis,such as a transient dynamic analysis.The paper using theory of optimization, with help of the computer and Aided by ANSYS, the plan pick up the design variable, aim fuction and found constraint condition in the section roommate. Apply it to torpedo trail, and obtain obvious benefit. Then the three-dimensional model of optimized structure are created renewedly and fed back to the torpedo trail' three-dimensional model for simulation.Then accomplish the tolerance analysis by VisVSA module of VisMockup, and ensure dimension torlerance and location torlerance in reason,ensure the capability of manufacture.This article also gives two developments to the axis' s optimized procedure basing on APDL, so it achieved the parameter modeling, as well as the parameter loading on the axis. In the case of structural optimization to similar torpedoes, the controlling codes without giving a great changes can be transplanted and used. In a word, the procedure could effectively improve the efficiency and reliability of the work.