The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In order to improve the dynamics behavior of roll gimbal in an aerial three-axis ISP system while minimizing the mass and external size, the modal analysis with Finite Element Method (FEM) was carried out. Based on the modal analysis results, the structure of roll gimbal was optimized. Compared to the original structure, the dynamics performance of the optimized structure is improved remarkably, whose...
By the use of theories of Finite Element Method(FEM) and multibody system(MBS), the kinematics expression of elastic body in multibody system, its elastic deformation described with Rayleigh-Ritz method and its equation of motion based on d'Alembert law and Jourdain's virtual power principle are studied in detail. And the processing method to express the characteristic information of elastic body...
The development requirements of the high-speed and heavy-loaded trend put forward new research subjects and challenges for vehicle systems and their dynamics, especially the dynamics questions caused by elastic body and rigid-flexible coupling. By combining theories of multibody system and FE, the kinematics expression of elastic body in heavy haul system, its elastic deformation and its equation...
Wood is a kind of natural resource, and it has better strength and stiffness, so it is adapt to build wood structures, such as wooden bridge and building. However, wood is vulnerable to decay by all kinds of rot fungi, so it is need to find some effective methods to test the information of defect and evaluate the position and degree of defect. Finite element method (FEM) and experiment modal analysis...
The finite element method was utilized in this paper to analyze multifunctional structures on airborne electronic equipment. The results of this analysis show that the strengthened tendons can improve the inherent frequency of the structure, the density of screws arrangement can also affect its inherent frequency, and the circuit of elements should be placed symmetrically. Finally a new type of multifunctional...
We have realized a sound directivity control of a large planar diaphragm by controlling the bending vibrations using multiple vibrators. This paper proposes a method to determine the parameters such as the shape and thickness of the diaphragm and the position of the vibrators. In this method, the finite element method (FEM) is used to simulate the diaphragm vibrations and the boundary element method...
Modal analysis of satellite system is the basic requirement for the satellite structural design. The theory of normal modes is analysed rounded in this paper. And the finite element model of a small satellite, of which the monolithic structure is honeycomb sandwich plate, is established by using the finite element analysis software PATRAN/NASTRAN. Furthermore, the equivalent model for honeycomb sandwich...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.