Analysis of vibration isolation efficiency of a helicopter main gearbox fluidlastic isolation system
XIA Shuangman1, LIN Changliang1, YUAN Shengtao1, ZHU Yuefa1, ZHANG Tilei2
1. Aircraft Design and Research Institute,AVIC Harbin Aircraft Industry Group Co.，Ltd.,Harbin 150066, China;
2. The Military Representative Office of the Army Aviation Department in Harbin Region, Harbin 150066, China
Abstract：In order to evaluate synthetically the vibration isolation efficiency of main gearbox fluidelastic isolation system in the helicopter, the fluidelastic isolation system and fuselage coupling dynamic simulation model was established. The vibration isolation efficiency of the fluidelastic isolator system was obtained by frequency response analysis. The suspension method was applied to carry out the ground vibration test for the helicopter with the fluidelastic vibration isolation system. The simulation analysis and test results showed that the comprehensive vibration isolation efficiency of the fluidelastic vibration isolation system along the heading, lateral and vertical direction,was more than 70%. This conclusion could provide technical support for optimal design of the fluidelastic vibration isolator system。
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