To investigate the transmission of loomvibration to the ground and to investigate thecharacteristics of the influence of vibration onhouses near a weaving mill, measurementswere made of an oscilating frequency of theground and of the vibration of the neighbourhouses, when many looms ran simultaneously.
The experimental results showed that :
(1) Number of proper vibration of a woodenhouse was 23Hz in horizontal direction. On asoft ground where it is easy to make resonanceof the low frequency of 23 Hz caused by abeating-up motion of looms, neighbour housesresonated at this low frequency, resulting in serious environmental problems.
(2) Therefore, in such area, there was noother way to prevent a large oscilatingmove-ment of looms than the construction methodto install many looms on the floating slabs.
(3) On the firm ground where it is difficultto make resonance of the low frequency, vib-ration frequency affecting neighbour houses wascomparatively high. The use of vibration-freedevices already developed was considered effec-tive to some extent.
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