Pressure stability is one of the main performance of window cleaning hanging platform. It refers to the sudden buckling under the action of press load or displacement load, window cleaning platform loses efficiency. It is important to analyze the stability of window cleaning hanging platform by finite element method.
The instability is a transient phenomenon, before instability, small displacement and strain generated, after instability, it become larger. There are two methods to solve the problem, the first is according to eigenvalue, another is judging by tracking path, obtaining structural changes, stress and load distribution before and after instability.
The column instability is similar to rod stability, deviation of the central axis. Set up half entity model When building the finite element model, according to actual condition, the left of window cleaning hanging platform is fixed, the right side is constrained by axial displacement, the internal cavity proportion is applied with pressure, and the symmetric surface is subjected to constraints. When the internal pressure was applied to 7.2mpa, the platform's central axis barely shifted and the column instability did not occur. When the internal pressure is applied to 7.3mpa, the platform starts to lose stability. When the internal pressure is applied to 8MPa, obvious buckling occurs.
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