Research on Air-Structure Coupling Characteristics of Sounding Board
According to the characteristics of the shape of sounding board, the structure is immersed in gunpowder pulsation flow, the virtual mass method can be used to research on sounding board. The 3-dimensional element is used to discretize the sounding board and its surrounding air, the gas is coupled with the structure directly by the gas mass matrix. The coupling motion equation model of the sounding board and its surrounding air can be derived.The coupling modal of the sounding board system is calculated by using the software of ansys, and the data of gunpowder explosion pressure pulsation is obtained from the calculation in autodyn, then the frequency and modal of the sounding board system were further analyzed in the software of ansys. The results show that there are some significant changes in the frequency and modal of the sounding board system under the condition of prestress as well as the air-structure coupling of gunpowder pulsation fluid flow.
S. B. Pei and R. Z. Liu, "Research on Air-Structure Coupling Characteristics of Sounding Board", Advanced Materials Research, Vols. 308-310, pp. 1074-1079, 2011