Integrity Testing of Cast In Situ Concrete Piles Based on an Impulse Response Function Method Using Sine-Sweep Excitation by a Shaker

Zheng, Haitao; Ertel, Jens-Peter; Kourmpetis, Miltiadis; Kanfoud, Jamil; Niederleithinger, Ernst; Gan, Tat-Hean

doi:10.1007/s10921-019-0595-4

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…After the test and calculation in SIEMENS TESTLAB itself, sixth-order modal frequencies are obtained [34][35][36][37][38] (Table 4). Although the continuum theoretically has an infinite number of natural frequencies, in many cases, we only care about low-order natural frequencies or specific-order natural frequencies.…”

Section: Analysis Of Experimental Modalmentioning

confidence: 99%

Vibration and Constitutive Relations of Viscoelastic Cantilever Beam of HTPB Propellant

Gao

2022

Mathematical Problems in Engineering

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A cantilever beam test specimen of a viscoelastic material, which is sourced from the hydroxy-terminated polybutadiene (HTPB) propellant, has been made. The traditional experimental modal analysis (EMA) is performed using the SIEMENS TESTLAB software to obtain the first six orders of modal frequencies based on the Poly MAX method, thereby determining the frequency range associated with the frequency domain analysis. The relaxation modulus of this viscoelastic material is first measured using a thermo-viscoelasticity analyzer (DMA); subsequently, the relaxation modulus is adopted to fit the 19-parameter Prony series of conformational models that characterize this viscoelastic material. Sinusoidal frequency sweep is then conducted on the SIEMENS TESTLAB platform, and the corresponding measured signals are obtained. Using the finite element method, a transient analysis simulation of the experimental conditions is performed. The dynamic response of this viscoelastic material under sinusoidal frequency sweep is evaluated by comparing it with the experimental data. It is observed that the overall acceleration peak error and the finite element simulation result are less than 3%. This study verifies that the obtained static constitutive equation (19-parameter Prony series) can describe the dynamic responses at low frequencies (<80 Hz).

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Section: Analysis Of Experimental Modalmentioning

confidence: 99%

Vibration and Constitutive Relations of Viscoelastic Cantilever Beam of HTPB Propellant

Gao

2022

Mathematical Problems in Engineering

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“…[8][9][10] 4. Numerical results In this section, experiments are carried out on the features mentioned in this paper and the feature-based non-coherent detection algorithm.…”

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confidence: 99%

Detection of Incoherent Signal In Molecular Communication Based on Channel Impulse Response

Wen

2021

J. Phys.: Conf. Ser.

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In order to solve the problem of intercode interference (ISI) and background noise caused by molecular diffusion in molecular communication, Honda analyzed and studied four methods to resist ISI signal, and analyzed the characteristics of the received signal at the moment. A reliable incoherent molecular signal detection algorithm independent of channel impulse response (CIR) is proposed, and an adaptive threshold calculation method is designed, and the theoretical value of bit error rate (BER) is given. The simulation results show that the proposed scheme BER is lower than the traditional scheme BER under the same computational complexity, so it has a wide application prospect in the nanoscale molecular communication system with limited computing power.

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Field experimental investigation on bearing characteristics of super-long pile under dynamic compaction in land reclamation area

Li,

Bai,

Yin

et al. 2024

Applied Ocean Research

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Integrity Testing of Cast In Situ Concrete Piles Based on an Impulse Response Function Method Using Sine-Sweep Excitation by a Shaker

Cited by 5 publications

References 16 publications

Vibration and Constitutive Relations of Viscoelastic Cantilever Beam of HTPB Propellant

Vibration and Constitutive Relations of Viscoelastic Cantilever Beam of HTPB Propellant

Detection of Incoherent Signal In Molecular Communication Based on Channel Impulse Response

Field experimental investigation on bearing characteristics of super-long pile under dynamic compaction in land reclamation area

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