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Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
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Related Experiment Video

Updated: Mar 1, 2026

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
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Passive vibration control: a structure-immittance approach.

Sara Ying Zhang1, Jason Zheng Jiang1, Simon A Neild1

  • 1Department of Mechanical Engineering, University of Bristol, Queen's Building, University Walk, Bristol, BS8 1TR UK.

Proceedings. Mathematical, Physical, and Engineering Sciences
|June 8, 2017
PubMed
Summary
This summary is machine-generated.

A new structure-immittance approach unifies vibration absorber design, enabling simultaneous investigation of multiple configurations and precise control over complexity. This method enhances vibration suppression in buildings and automotive suspensions.

Keywords:
inerterrestricted complexity realizationsystematic approach

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Area of Science:

  • Mechanical Engineering
  • Vibration Control
  • Structural Dynamics

Background:

  • Traditional linear passive vibration absorbers, like tuned mass dampers, utilize springs, dampers, and masses.
  • A growing trend incorporates inerters to supplement or replace mass elements in absorber designs.
  • Current design methodologies, structure-based and immittance-based, have inherent limitations.

Purpose of the Study:

  • To introduce a novel structure-immittance approach for designing linear passive vibration absorbers.
  • To provide a unified framework that combines the strengths of existing design methodologies.
  • To demonstrate the versatility and effectiveness of the proposed approach through practical applications.

Main Methods:

  • Development of a general formulation process to represent absorber networks using structural immittances.
  • Application of the structure-immittance approach to systematically analyze series-parallel networks of springs, dampers, and inerters.
  • Validation through case studies focusing on building vibration suppression and automotive suspension systems.

Main Results:

  • The structure-immittance approach allows for the investigation of a broad class of absorber possibilities.
  • This method enables simultaneous control over absorber complexity, topology, and element values.
  • Case studies confirmed the approach's efficacy in practical vibration mitigation scenarios.

Conclusions:

  • The proposed structure-immittance approach offers a comprehensive and flexible framework for vibration absorber design.
  • It effectively integrates the advantages of both structure-based and immittance-based methods.
  • This unified approach holds significant potential for advancing vibration control in diverse engineering fields.