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Radar antenna axis dynamic response of mechanical systems


By 25m / s the role of uniform wind speed (wind direction change),[link widoczny dla zalogowanych], is calculated to maintain uniform rotation per minute for 6 weeks required for the antenna array of driving torque and the displacement of the surface point A (given in the form of curves) taking into account the stiffness of a better antenna base and minimize the computation, one revolution of the antenna is divided into 50 intervals, the total number of 575 nodes, plates, a total of 1088 beam elements. Calculated using the above method 2O seconds before the results will be converted to the displacement A coordinate system, and then calculating the data plotted curve shown in Figure 3, Figure 4 (Figure 3 is a magnification of 500 times the deformation after the superposition of rigid body displacement result, because A point of rotation radius 3.5m, elastic deformation (mm level) is too small compared with the rigid displacement, Figure 4 is also the speed, acceleration amplitude 500 times put too much on behalf of equation (7) after the drawn curve). Enormous amount of computation in this case,[link widoczny dla zalogowanych], the Pentium 100 with dozens of hours of operation. Figure 2 diagrams a certain type of antenna selection Lei Li Pu, etc. Phase 1: Single radar antenna mechanical system dynamic response 1O5l / B 3-point displacement curve of Figure 4,[link widoczny dla zalogowanych], torque curve results obtained by the appropriate pre-antenna (1 soft body), Antenna (0 soft body) of the modal matrix (just take the first few vibration modes), then the modal coordinates,[link widoczny dla zalogowanych], the order of differential equations can be greatly reduced, greatly improving efficiency,[link widoczny dla zalogowanych], but for the rotation of the antenna , how to get additional boundary condition modes? So get the proper pre-shapes is a difficult problem. Hong-chu reference oscillator. Multibody System Dynamics - Theory, method and applications. Shanghai: Shanghai Jiaotong University, 1993 CENTRAL SOUTH HIGHWAY. Principle and Application of finite element even. Beijing: China Water Power Press, 1979WittenbergJ. Automatieconstructionofnonlinearequationsofmotionforsystemswithmanydegreesoffreedom. Euromech38Colloquium. LouvainLaNeuveBeilium a 3-5, September1973Ossenberg. Franzes. Equationofmotionofmultiplebodysystemswithtranslationalandrotationalde-greesoffreedom. Euromech38Colloquium. LouvainLaNeuve. Belgium ,3-5September, 1973DynamicResponseofSingle-ShaftRadarAntennaMechanicalSystemLiP (DepartmentofMechanicalEngineering, SoutheastUniversityNanjing, 210096) HuaMuh'ng (The14thResearchInstituteoftheElectronicIndustryMinistryNanjing, 210013) AbstractThesingle-shaftradarantennaisamechanicalsystemoftwoflexiblebodies. Basedonthelagrangeequationandthefiniteelementapproach, thedynamicequationoftheantennaisestablished. Fromthepracticalconsideration, theequationsandthecalculationmethodarepresentedwhentheantennarota-tionsperminuteisconstant. Theantennamotortorqueanddisplacementresponsesaregivenwhenthevelocityofwindis20m. Keywords: radarantennas ~ dynamics; responses {thefiniteelementmethod first author Li Pu M, MA, September 1971 students.

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