Analysis And Study On The Stability Of Cylinder Spiral Reinforcing External Pressure

Design and processing of a pressure test device for the pressure6MPa."Lulu" cans for the external pressure test pieces, spiral spring is a spiral reinforcing ring, spiral of different section size and pitch of the stiffening ring strengthen specimen experiments were carried out a series of external pressure, the critical pressure and the corresponding buckling wave number。Tensile test of "Lulu" pop-top can body materials then determine the yield limit of mat-erial, the modulus of elasticity, etc., eigenvalue buckling and nonlinear buckling analysis by finite element software ANSYS, finding that the nonlinear buckling analysis result and the experimental result is more close to。Using orthogonal design method to set25groups of spiral reinforcing external pressure parameters of cylinder structure, to strengthen the external pressure cylinder helix are nonlinear buckling analysis, using the least square method to fit the model free parameters normalized, a empirical formula between the critical buckling pressure of external cylinder and dimensionless structural parameters of the spiral reinforcing is developed, discussion the different structural parameters of spiral reinforced cylindrical critical pressure Influence. The empirical formula of critical pressure ring strengthen cylinder is obtained by using the same method。Comparison of the critical pressure of ring and strengthen strengthening spiral cylind-er, found in the range of parameters is discussed, both the critical pressure difference, the relative error is less than4%。...