Research And Design Of U-type Water Surface Rescue Equipment Based On Rapidity

According to statistics,more than 50000 people die of drowning every year in China.At present,the water rescue equipment focuses on the safety and reliability research,which can not be quickly and accurately delivered to the people in the water,and the rescue effect needs to be improved.According to the characteristics of the process of rescuing the drowner,this paper designs a U-type water rescue equipment,which can quickly rescue the drowner,isolate the contact between the lifeguard and the drowner,avoid the danger to the lifeguard,improve the rescue efficiency and reduce the rescue cost.According to the characteristics of the new rescue equipment in water movement,this study focuses on the calculation method of viscous resistance and wave making resistance of the rescue equipment,further selects the three-dimensional conversion method to calculate the viscous resistance,uses the Rankine source method to solve the wave making resistance,and the sum of the two is the total resistance of the rescue equipment.Using fluent program to calculate the movement of the rescue equipment,the results show that when the U-type rescue equipment is driving at high speed,the viscous resistance gradually decreases,and the wave making resistance gradually increases with the increase of the driving speed.In order to improve the operation speed of rescue equipment,three parameter variables are selected to establish the parameter model of Utype rescue equipment.Genetic algorithm is used to establish the optimal analysis model of the rescue equipment.Taking the total resistance as the optimization objective and the displacement as the constraint condition,100 individuals of the initial population are obtained.Through 30 iterations,the optimal rescue equipment line data are obtained.The resistance of the rescue equipment at the speed of 0.25m/s,0.5m/s,0.75m/s,1.0m/s,1.25m/s and 1.5m/s is calculated.The calculation results show that the resistance is 0 3,the total resistance of the optimized rescue equipment is reduced by 4.39%,which shows that the genetic algorithm can significantly reduce the viscous resistance and wave making resistance of the rescue equipment.