Research of Double Circular-Arc Gear Fast Modeling Based on CATIA Secondary Development
Through the analysis of double circular-arc gear basic gear profile and the use of coordinate transformation method, this paper deduces the gear end-face equation of double circular-arc gear. With CATIA secondary development as a tool and double arc gear as the study object, accurately calculates the gear teeth curve profile and generate a double circular-arc gear one-time three-dimensional model by using the VB language programming, so as to improve design efficiency and accuracy, which lays a foundation for the strength analysis of the double arc gear, follow-up design and development of simulation, virtual assembly solid model.
Automatic Modeling System for Skeleton Model of Aircraft with Complex Surfaces
There are complex and repeated modeling works during the process of aircraft design, which leads to the heavy workload and low working efficiency. In order to improve the quality and efficiency of aircraft structure design, an automatic modeling system for skeleton model of aircraft with complex surfaces is developed based on CATIA VBA. The system can provide the generation of the main structure skeleton model of the aircraft, the creation/output of skeleton model properties and the automatic splitting of the aircraft skin. Besides, an aircraft design template is proposed to formalize the design standardization of aircraft structure and rapid modeling procedure. The efficiency and accuracy of the aircraft structure design are improved, and the finite element pre-processing time is shortened by the system.
Frequency selective surface design for blinds applications
In this paper, the reconfigurable blind structure with frequency selective surfaces(FSS) for the building applications are presented. Frequency transmission characteristics for different angles of the proposed blind-FSSs are investigated and verified through simulation and measurement. The simulation results show that we can implement the reconfigurable blind-FSS for multiband wireless applications. To verify the proposed paper, two kinds of blind-FSSs, crossed dipole FSS and circular ring FSS are fabricated and measurements are performed for different angles. The proposed structure in this paper which is very simple, can be easily applied to any planar surface for wireless security applications at low cost.