Figure 16
The horizontal axis is labeled “G subscript int [megapascal]” and plotted on a logarithmic scale from 10 to the negative 4 power to 10 to the 4 power with multiples of 10. The left vertical axis is labeled “f subscript 1, 4 P [Hertz]” and ranges from 60 to 120 with an interval of 20, and the right vertical axis is labeled “T subscript cell, avg [degrees Celsius]” and ranges from 0 to 100 with an interval of 20. A solid blue curve labeled “Analytical f subscript 1, 4 P” starts near 64 Hertz at a low G subscript int value around 10 to the negative 4 power, remains nearly flat up to about 10 to the negative 1 power, then rises sharply between about 10 to the 0 power and 10 to the 2 power, and approaches 118 to 120 Hertz toward the highest values near 10 to the 4 power. Circular markers labeled “Numerical f subscript 1, 4 P” are plotted along the blue curve. Triangular markers connected by a line represent “E V A (G subscript int versus T subscript cell, avg)” and correspond to the right vertical axis. These markers form a decreasing trend from left to right, starting near 100 degrees Celsius at G subscript int around 4 times 10 to the negative 1 power, then dropping to about 50 degrees Celsius near 10 to the 0 power, and approaching about 0 degrees Celsius at 10 to the 1 power. Text near the bottom left reads “Layered limit (abs)”, and near the bottom right reads “Monolithic limit (full)”. A legend in the upper left lists “Analytical f subscript 1, 4 P”, “Numerical f subscript 1, 4 P”, and “E V A (G subscript int versus T subscript cell, avg)”. Note: All numerical data values are approximated.Frequency analysis for the examined point-supported BIPV floor tile under ordinary operating conditions (ABAQUS): variation of vibration frequency f1,4P (numerical and analytical), as a function of the average temperature in the solar cells, Tcell,avg, and associated shear modulus of the encapsulant, Gint. Source: Authors’ own work