For statically indeterminate structure, the internal force will be changed with the translation of the supports, because the internal force is related to the absolute value of the stiffness EI. When the tension is dif...For statically indeterminate structure, the internal force will be changed with the translation of the supports, because the internal force is related to the absolute value of the stiffness EI. When the tension is different with the compression modulus, EI is the function of internal force and is not constant any more that is different from classic mechanics. In the other words, it is a nonlinear problem to calculate the internal force. The expression for neutral axis of the statically indeterminate structure was derived in the paper. The iterative program for nonlinear internal force was compiled. One case study was presented to illustrate the difference between the results using the different modulus theory and the single modulus theory as in classical mechanics. Finally, some reasonable suggestions were made for the different modulus structures.展开更多
Weight reduction of the frame type veneer hydraulic press is an important object.The finite element model is made up,importing the 3D model of the frame to the OptiStruct block for meshing and optimization.Static stre...Weight reduction of the frame type veneer hydraulic press is an important object.The finite element model is made up,importing the 3D model of the frame to the OptiStruct block for meshing and optimization.Static stress analysis is made to the hot press's frame,ANSYS is used to build the frame's finite element model,and then the internal force distribution,displacement and deformation of various parts are obtained under certain working conditions.In order to reduce costs,it is necessary to optimize the previous model and reduce the weight of the frame.Alterable density method is a novel method in topological optimization.OptiStruct is used to make topological optimization of the frame and to obtain the new model.Compared to the previous model,the latter one can guarantee the strength and the rigidity,achieving the purpose of saving materials.展开更多
文摘For statically indeterminate structure, the internal force will be changed with the translation of the supports, because the internal force is related to the absolute value of the stiffness EI. When the tension is different with the compression modulus, EI is the function of internal force and is not constant any more that is different from classic mechanics. In the other words, it is a nonlinear problem to calculate the internal force. The expression for neutral axis of the statically indeterminate structure was derived in the paper. The iterative program for nonlinear internal force was compiled. One case study was presented to illustrate the difference between the results using the different modulus theory and the single modulus theory as in classical mechanics. Finally, some reasonable suggestions were made for the different modulus structures.
文摘Weight reduction of the frame type veneer hydraulic press is an important object.The finite element model is made up,importing the 3D model of the frame to the OptiStruct block for meshing and optimization.Static stress analysis is made to the hot press's frame,ANSYS is used to build the frame's finite element model,and then the internal force distribution,displacement and deformation of various parts are obtained under certain working conditions.In order to reduce costs,it is necessary to optimize the previous model and reduce the weight of the frame.Alterable density method is a novel method in topological optimization.OptiStruct is used to make topological optimization of the frame and to obtain the new model.Compared to the previous model,the latter one can guarantee the strength and the rigidity,achieving the purpose of saving materials.
