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Local contact system noise absorber damping coating on a preliminary study

Ratio. { value to meet all the requirements of the minimum damper how to choose the best location , it is necessary to use optimization techniques to solve. After the coating layer as a measure of the damping effect of vibration and noise reduction system is an important indicator is the structure of Ru j consumption factor ,belstaff outlet, which is the reed vibration energy dissipation system and the ratio of the total deformation can be defined : one . 1 +2222 Lk {1 X ( , 2 / 12 ) [( 1 q) . Ten (ilk) from the next 】 } J < 1, domain go to items , then the above equation becomes: * Bu Xiao n2k = eh; a Chinese one ... Lu = and . Reed E , respectively , and the damping layer thickness and elastic modulus. (13) can also be expressed as: once a f ± Health ±:±!±!::!(+ 1 /(+)' Lan Lu = B · B are the beam and not with a paint coating the beam stiffness with (13). {; L '(14) (15) 3 LIN Zhong-qin et al: Local contact system noise absorber damping coating on the preliminary study on '67 ' from ( 14) and (15 ) shows that , when e is constant . / and B: / B increased monotonically with the law of 3 h examples shown in Figure 1 and Figure 2 , given :. a 1.5x10 a rfl :2-3x10rfl; El: 110GPa; E2: 2GPa; Hl = 5 × 10 a m; 2 = 1x10_. m; f_8x10_m; cycle of a 0.5ms: amplitude ratio of 2.85 , compare uncoated and coated law of vibration and response . solution to calculate the results shown in Table 1 and Table 2. Table I Vibrations uncoated coated Table 2 Vibrations 4 Conclusion 1) reed contact after coating by the damping . Improve the system damping ratio is conducive to vibration . 2) The material loss factor and loss factor of the ratio of mouth , coated and uncoated Ð Ð ° degree than in the e to the timing, all with the h value increases 3) the amount required to meet the requirements of self- Vibration decay cycle T and the ratio of two adjacent amplitude Y. /, +. When available damping ratio of each mode {, then you can optimize { . 4 ) If the lowest order damping ratio { . As indicators. The best position to optimize the coating and coating thickness.