Page 213 - Dust Explosions in the Process Industries

Case Histories 185

TRACING OF MEASURED OSCILLATORY
AMPLITUDE-MODULATEDSEISMIC SIGNAL
OF A SERIES OF EXPLOSION IMPACTS

A

I I l l I t I I I I I 1 I
0 2 4 6 a 10 12
TIME AFTER ONSET OF FIRST EXPLOSION [SI

POSTULATEDSEQUENCE AND RELATIVE
STRENGTHSOF NINE EXPLOSION IMPACT
ENERGY PULSES

OSCILLATORYAMPLITUDE-MODULATED
SEISMIC SIGNAL COMPUTED FROM
POSTULATEDSEQUENCE OF NINE IMPACT
ENERGY PULSES

C

Figure 2.25 Sequence of nine impact energy pulses from nine successive explosions in the Harbin
Linen Textile Plant, Marbin, Peoples Republic of China, March 15, 1987, postulated on the basis ofa
seismic record of the event (From Bowen et al., 1988).