How to adjust if the principle mechanism diagram of plastic pneumatic butterfly valve is not closed in place? The load response of pneumatic butterfly valve has the following points:
(1) The capsule has a large deformation, and the traditional linear theory has been unable to use;
(2) The capsule is composed of multi-layer curtain wires that form a certain angle with each other, and the structure of each layer is an anisotropic composite material. Under the load, the element stiffness matrix is no longer a constant;
(3) Under the load, the volume of the capsule changes greatly, resulting in the change of gas pressure in the capsule
The simulation analysis of pneumatic butterfly valve involves geometric nonlinearity, material nonlinearity, nonlinear boundary conditions or loads
(1) For the pneumatic butterfly valve capsule, there is a large deformation after loading, and each linear element and panel in the capsule has a large linear displacement and angular displacement relative to the natural state before loading, but the strain at each point in the structure is not large, and the stress is still lower than the elastic limit of the material
(2) It is a typical material nonlinear problem to solve the anisotropic composite material in pneumatic butterfly valve
(3) Under the action of load, the capsule will have a large displacement, resulting in the contact between the outer wall of the capsule and the skirt, which 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
