Bell Forces

On the windows of the belfry five bells are located (see Figure 8). These bells swing according to the Spanish system: A counterweight provides a high level of balance (see Figure 7) and the bells, directly anchored on the tower windows, rotate continuously in the same direction.

The characteristics of these bells have been determined according to the works of Heyman & Therefall (1976), Ivorra & Llop (2002) and Ivorra et al. (2005); they are presented in Table 2.

Figure 6. Power spectrum of obtained signal. (a) Accelerometer 6: 2.15 Hz. (b) Accelerometer 4: 2.24 Hz. (c) Accelerometer 5: 2.24 Hz, 5.95 Hz.

Figure 7. Bell Santas Justa y Rufina. Big rotating bell.

Figure 8. Bell disposition on the tower.

Figure 6. Power spectrum of obtained signal. (a) Accelerometer 6: 2.15 Hz. (b) Accelerometer 4: 2.24 Hz. (c) Accelerometer 5: 2.24 Hz, 5.95 Hz.

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