Dynamic Response Analysis Of Fasting Nets Shell Structure

With its rational structure, stress simple rods, strong ability of thecross, cylinder double-layer reticulated shell structure are widely used inmodern engineering construction. The static research is very mature and thecore problem has been solved, but its power performance study relativelylags behind, restricting its application in engineering practice.For these reasons, with the current research situation, this paper try toanalyze static and dynamic response of a new cylindrical double-shellstructure, and summarize its variation of internal forces, providing areference of this type of structure theory research and engineering practice.Firstly, the article introduces the basic shell structure, including thedevelopment of profiles, structure, structure selection, research methodsand content; elaborates seismic-span roof construction theory in the newseismic code of2010version.Analysis vibration characteristics of the structure, understand the lawsof natural vibration. Consider the span ratio, grid form, the form andbearing stiffness, the net additional load on the shell and shell thickness andother factors, solve structural natural frequency and mode shapes by usingthe subspace iteration method.Using the finite element method, analyze the shell distribution ofinternal forces and displacements under the action of the static load, understanding its static properties. Of6degrees,7degrees and8degreesfor multi-modal earthquake response spectrum analysis, time-historymethod using more than8degree earthquake for additional analysis, andthe static results were compared and summarized.The article also consider the geometric nonlinearity of the double-shellcylindrical8degrees for rare earthquake analysis, introducing initialdefects, and study the dynamic stability, draw some meaningfulconclusions for theoretical research and engineering design.