Structural Vibration Monitoring
(Dynamic Response & Modal Analysis)

Measurement and monitoring of structural vibration — natural frequencies, mode shapes, acceleration and velocity levels — for structural condition assessment, vibration compliance and machinery isolation design.

Overview

What is the Structural Vibration Monitoring?

Structural Vibration Monitoring uses calibrated accelerometers and seismometers to measure structural dynamic response — natural frequencies, damping ratios, mode shapes and vibration amplitudes. Changes in natural frequency are the most sensitive indicator of structural damage.

At Global Lab, vibration monitoring is conducted per ISO 4866 and IS 2974 for industrial machinery and per ASTM E2531 for structural dynamic characterisation. Our suite covers ODS analysis, ambient vibration surveys, blast vibration monitoring and continuous SHM vibration measurement.

Natural Frequency Measurement

Fundamental and higher mode natural frequencies determined by AVS.

Vibration Amplitude Limits

PPV and acceleration measured vs IS 2974 limits.

Blast Vibration Monitoring

PPV monitoring during blasting near structures for damage risk assessment.

ODS Analysis

Operational deflection shapes reveal vibration mode patterns under real loading.

NABL Certified Reports

All results on NABL-accredited letterhead per IS 2974 / ISO 4866.

Continuous Monitoring

Accelerometers installed for 24/7 structural vibration monitoring.

Test in Action

Structural Vibration Monitoring — Site Images

Tri-Axial Accelerometer on Bridge Girder

FFT Frequency Spectrum Analysis

Operational Deflection Shape Mode Plot

Test Procedure

How the Structural Vibration Monitoring is Conducted

1

Sensor Placement Plan

Accelerometers positioned at key structural nodes — floors, columns, midspan.
2

Background Noise Assessment

Ambient vibration levels measured without loading for baseline reference.
3

Vibration Measurement

Tri-axial accelerometers record vibration during operational loading or blasting.
4

Frequency Domain Analysis

FFT analysis extracts natural frequencies, damping and mode shapes.
5

Amplitude Assessment & Report

Peak accelerations and PPV compared against IS 2974 and ISO 4866 limits. NABL report within 48 hours.

Standards & Specifications

Applicable Test Standards

Standard	Title	Scope	Type
ISO 4866	Mechanical Vibration and Shock — Vibration of Fixed Structures	Structural Vibration	ISO
IS 2974	Code of Practice for Design and Construction of Machine Foundations	Machine Vibration	Indian Standard
ASTM E2531	Guide for Development of Bridge Structural Health Monitoring Systems	SHM Vibration	ASTM
DIN 4150	Structural Vibration — Effects of Vibration on Structures	Vibration Limits	German Standard

Applications

Where is the CAPO Test Used?

Machine foundation vibration assessment for IS 2974 compliance

Bridge natural frequency monitoring for structural condition assessment

Blast vibration monitoring during quarrying or demolition near buildings

High-rise building wind-induced vibration comfort assessment

Metro and railway-induced vibration measurement in adjacent buildings

Structural resonance investigation for vibrating machinery or footbridges

Why Choose Global Lab

Our Advantages

NABL Accredited ReportsLegally valid IS 2974 and ISO 4866 vibration certificates.

Full Frequency AnalysisNatural frequency, damping, mode shapes and ODS analysis all provided.

Blast Vibration ExpertiseExperienced in PPV monitoring for blasting near sensitive structures.

Pan-India CoverageVibration monitoring teams across all 7 lab locations.

Fast 48-Hour ReportVibration survey report within 48 hours.

Continuous SHM24/7 accelerometer monitoring for long-term structural health tracking.

Structural Vibration Monitoring(Dynamic Response & Modal Analysis)