Vibrational characteristics of truss core sandwich panel under thermal environment: effect of core topology

Abstract

The present study demonstrates the vibrational characteristics of truss core sandwich panel subjected to thermal environment. Initially critical buckling temperature of the sandwich panel is calculated based on finite element method. Further the free and forced vibration characteristics of truss core sandwich panel is studied for different percentage of buckling temperature under different thermal environment. The result reveals that temperature field at 95% of buckling temperature does influences the vibration response irrespective of truss core topology. Further it is observed that case (a) and case (d) (note: Case a—uniform temperature field, ($$T(x)= T_{max}$$) and Case d—increase and decrease temperature fields modeled by heating at the middle of the panel ($$T(x)= T_{max}[1-abs (1-\frac{2x}{L})^{2}]$$)) temperature field does influences the response to a greater extent as compared to other two cases of temperature field. From the results it is revealed that the vibration response of triangular core at lower frequency is less compared to trapezoidal and cellular core sandwich panel.