Analysis Of The Deployable Mechanism Of Dipping Sonar And Fluid Coupling Of Structure

Dipping sonar plays an important role in modern anti-submarche warface,The opening radius of has significant effect on the performance of dipping sonar.With the development of submarche stealth technology,it is a trend to develop new scalable dipping sonar.The essay summarizes advantage and disadvantage of dipping sonar,putting forward 3 kinds of overall structure design,and selecting eigth-bar mechanism as the expansion device of dipping sonar.According to the requirement of the overall design,it completes the structure design of the dipping sonar expansion device,during part and pressure persistant cabin formulas.Based on the kinematics and dynamics formulas established by vector law,it created Malab's m function,and received established Simulink's procedure,the simulation results of five-bar mechanism.On the basis of five-bar mechanism,the essay created Simulink simulation procedure of eight-bar mechanism,and obtained the motion parameters of various components in the expasion device.Adams and Matlab are used to obtain the input function of eightbar mechanism.Combined with Simulink simulation procedure of eight-bar mechanism,it finished the dynamic simulation of eight-bar mechanism and received force of constraint and diving moment of every anticulate point.Using the fluid-solid coupling method,and basic data such as force of constrant and driving moment,it completes the stastic analysis of dipping snoar's expansion device under three conditions,offering important reference to the structure design of dipping sonar.According to Lewis' s additional hydwstatic pressure theory and fluidsolid coupling method,it obtained dipping sonar's frequency in water,and compared with frequency in air,analysis calculative result differences caused by three various method.It finished the frequency's calculation of dipping sonar under different depth of water,analyzing the effect of depth of water on frequency,calculating damping and deformation of supporting bar with different cross-sectional shapes,completing the optimization of design of supporting bar...