Finite-difference time-domain simulation of floor-impact sound excited by one-dimensional contact model and its application to auralization of floor-impact sound

Asakura, Takumi

doi:10.1250/ast.42.22

Cited by 1 publication

(2 citation statements)

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“…The VL Z at each floor in tested building described in 2.1 under the impact of metal ball was predicted by the prediction model of VL Z (see equation (6)). The comparison between predicted result and measured result is presented in Table 4.…”

Section: The Verification Of the Prediction Model Of Vl Zmentioning

confidence: 99%

“…The bang machine which can drop a 7.3 kg tire from a height of 85 cm or a 2.5 kg rubber ball which falls freely from a height of 100 cm is used to simulate heavy-weight impact sources such as human running and jumping. 6,7 Impact sources such as fallen rigid objects and hammers used in building decoration have great stiffness and the duration of these impacts on structures is shorter. Compared with that induced by human walking, running, and jumping, the energy of structural vibration caused by these impact sources mainly distributes in a higher frequency range.…”

Section: Introductionmentioning

confidence: 99%

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The transmission characteristics and influence prediction of impulsive vibration caused by a solid metal ball impact in buildings

Guo

Lin

2022

Journal of Low Frequency Noise, Vibration and Active Control

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The impulsive vibration induced by human running and jumping, object falling, striking during decoration, etc., significantly disturbs the learning, work, and life of people through building structure transmission. To study the influence of impulsive vibration in buildings, a vacant frame building was selected as a tested building. The vibration at each floor besides hitting spot would be measured when a solid metal ball falling freely hit the first floor of this building. The vibration response at each floor caused by the excitation above was simulated through a finite element method. The parameters of the simulation model were optimized according to measured results. Furthermore, the influence of building structure, the total amount of stories, and slab dimension on the transmission of vibration from 1 Hz to 80 Hz which can be perceived by human bodies was quantitatively studied. Results showed that the vertical weighted vibration acceleration level at each floor linearly decreased with the increase of the logarithm of the distance between each floor and the hitting spot. A prediction model of vertical weighted vibration acceleration level from 1 Hz to 80 Hz induced by the impulsive vibration in buildings was developed according to simulation results. The corrections relating to the number of story, building structure, slab span, slab length-to-width ratio, and slab thickness were respectively introduced in the model which can predict the vertical weighted vibration acceleration level at each floor above the hitting spot. The results of this study can provide a basis for the prediction and control of impulsive vibration caused by an impact source with great stiffness in buildings.

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Section: The Verification Of the Prediction Model Of Vl Zmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%