Analysis of load response of pneumatic ball valve
The load response of pneumatic ball valve has the following characteristics:
(1) The capsule has a large deformation, and the traditional linear theory has been unable to apply;
(2) The capsule is composed of multi-layer curtain wires that form a certain angle with each other, and each layer is composed of anisotropic composite data. Under the load, the element stiffness matrix is no longer a constant;
(3) Under the load, the volume of the capsule changes greatly, leading to the change of gas pressure in the capsule The simulation analysis of pneumatic ball valve involves geometric nonlinearity, data nonlinearity, nonlinear boundary conditions or loads
(4) As for the pneumatic ball valve capsule, there is a large deformation after being loaded, and each line element and panel element in it has a large linear displacement and angular displacement relative to the natural state before being loaded, but the strain at each point in the structure is not large, and the stress is still lower than the elastic limit of the data
(5) Solving anisotropic composite data in pneumatic ball valves is a typical nonlinear problem
(6) Under the action of the load, the capsule will have a large displacement, forming the contact between the outer wall of the capsule and the skirt, which will interact. Contact is a complex problem with highly nonlinear boundary conditions. It is necessary to accurately track the movement of objects before contact and the interaction between objects after contact