METHOD OF DETERMINING DYNAMIC ELASTICITY MODULUS OF MATERIALS

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to the acoustic u0438u0441u0441u043bu0435u0434u043eu0432u0430u043du0438u00a0u043c materials, namely the ways of u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 dynamic u043cu043eu0434u0443u043bu00a0 elasticity. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - enhancing accuracy by u0438u0441u043fu043eu043bu044cu0437u043eu0432u0430u043du0438u00a0 tier load. a way to implement as follows. in the process of u0432u0434u0430u0432u043bu0438u0432u0430u043du0438u00a0 an acoustic resonator are cross cutting depth u0432u0434u0430u0432u043bu0438u0432u0430u043du0438u00a0 and changing the resonant frequency.u043fu043eu043bu0443u0447u0435u043du043du0430u00a0 dependence of f (h) u0430u043fu043fu0440u043eu043au0441u0438u043cu0438u0440u0443u0435u0442u0441u00a0 u043fu0440u00a0u043cu043eu0439 and elastic modulus u043eu043fu0440u0435u0434u0435u043bu00a0u0435u0442u0441u00a0 formula e = n tg, where the angle of the u043fu0440u00a0u043cu043eu0439, n is the coefficient obtained in the city u0443u0438u0440u043eu0432u043au0435. 2).