Vibration & Dynamics - Investigation, Test, Analyse, Design & Support - Problem Solving

We are an established, independent, chartered engineering–led company that resolves vibration and structural dynamics problems so that designs comply with design requirements and international industrial standards.

Environmentally Sound Limited investigates, tests, analyses, designs and supports vibration issues on machinery, structures and equipment across the UK and Europe. We work end-to-end: from first investigation through design and implementation support to verification and qualification testing.

Our proven solutions span oil and gas, aerospace, automotive, telecommunications, mining, manufacturing and specialist high-tech facilities.

Talk to a Vibration Specialist Explore Vibration & Dynamics Services

We help you to:

Reduce vibration and resonance to protect assets and extend fatigue life.
Meet design requirements and international standards (e.g. ISO 20816/10816, API 619, MIL-STD-810, RTCA DO-160, VC criteria).
Control structure-borne noise from vibrating machines and pipework.
Demonstrate compliance to customers, regulators and other stakeholders.
Move from recurring vibration problems to stable, predictable operation.

Next steps

Discuss a vibration problem – outline your issue and timescales.
Explore our vibration & dynamics services – see where we can help most.

Vibration performance & compliance

For many projects, vibration is not just a comfort or reliability issue – it is a compliance requirement. We interpret and apply the relevant limits so that designs and installations meet their vibration criteria in practice, not just on paper.

Applying OEM and client vibration limits to real installations and operating modes.
Working to international vibration standards (for example API, ISO 10816/20816, ISO 7919, VC vibration criteria and project-specific specifications).
Designing and refining structures, supports and isolation systems so machinery runs within its permitted vibration envelope.
Supporting design verification and qualification testing so that equipment passes first time – de-risking the project from the outset.

Design it right first time

We apply our vibration and dynamics expertise in the design phase, so compliance and performance are built in from the start – de-risking the project from the outset, gaining confidence and avoiding wasted investment in corrective actions later.

Why Vibration & Structural Dynamics Matter

Vibration and structural dynamics sit at the heart of how machinery and structures behave under real operating conditions. Frames, pipework, platforms, floors and vehicles all have natural frequencies and mode shapes; when these are excited by rotating machinery, flow pulsations, impact or external inputs, the result can be damaging and disruptive.

Typical symptoms include:

Excessive vibration at particular speeds or operating conditions.
Repeated cracking of welds, brackets or supports.
Loosened fasteners, leaking joints and failed seals.
“Ringing” or booming panels, pipework and housings generating noise.
Complaints from operators or neighbours about vibration and noise.

The risks are technical, commercial and reputational:

Safety and asset integrity – fatigue crack growth, shaft and bracket failures, bearing damage and structural degradation.
Business continuity – unplanned outages, forced derating of equipment, reduced throughput and increased maintenance.
Compliance and reputation – failure to meet customer design requirements, OEM specifications or international standards; environmental noise and vibration complaints.

Early, specialist vibration and dynamics input helps you:

Avoid repeated failures and trial-and-error modifications.
Design structures and supports correctly from the outset.
Provide clear, defensible evidence to customers, certifiers and regulators.
Reduce the risk of failed tests, redesign loops and corrective actions when compliance is not met.
Increase the mean time between failures (MTBF).

Our Vibration & Dynamics Engineering Process

Investigate → Measure → Analyse → Design → Support

Investigate

We begin by understanding the problem in its context:

Review failure history, inspection findings, maintenance records and complaints.
Examine drawings, specifications, past calculations and previous reports.
Carry out site walk-downs to understand layout, supports, boundary conditions and operating envelopes.
Review failure history, inspection findings, maintenance records and complaints.
NVH framing (when relevant): confirm whether the symptom is Noise, Vibration or “Harshness”, where it is perceived/measured, and the pass/fail target (OEM/customer NVH requirement or acceptance criteria).

This stage frames the problem clearly and prevents premature “solutioneering” before the evidence is in.

Measure

Where appropriate, we measure the real vibration behaviour:

Vibration levels at key locations and directions on machines, structures and pipework.
NVH capture (as needed): measure vibration and the associated acoustic response together (e.g., casing/structure vibration with local sound level) to link excitation → transmission path → response.
Vibration levels at key locations and directions on machines, structures and pipework.
Rotational speeds, orders, 1X/2X components, gear mesh and other characteristic frequencies.
Transient and steady-state behaviour during start-up, shutdown and critical operating conditions.

We use appropriate instrumentation and techniques, such as:

Multi-channel data acquisition with tri-axial accelerometers, velocity sensors and proximity probes.
Experimental modal testing with impact hammers and shakers.
Operating deflection shape (ODS) measurements to visualise how structures move.

The result is a set of high-quality measurements and plots that show what is actually happening, not what we assume is happening.

Analyse

We then analyse the data and the structure together:

Frequency-domain analysis, order tracking and time-history review.
NVH mechanism linking: correlate dominant orders/frequencies and mode shapes to the noise/“harshness” complaint to identify the excitation source, transmission path and amplification mechanism.
Finite Element Analysis (FEA) of frames, platforms and components where needed.
Correlation of test results and models (model updating) to give a reliable basis for design decisions.

Typical questions we answer include:

Is the problem driven by resonance, unbalance, misalignment, looseness or a combination?
Are dynamic stresses exceeding allowable fatigue limits?
Are vibration levels within ISO/API/VC limits or customer-specified criteria?

You receive clear conclusions, supported by measured data, plots and calculations.

Design

When the root cause is understood, we design practical solutions:

Structural modifications such as stiffening, mass changes or additional bracing.
Isolation and mounting systems, including tuned supports and interface details.
Revised support layouts, fastening strategies and joint designs to avoid resonant behaviour.

Designs are developed within your constraints:

Space, access and constructability.
Maintainability and operation.
Cost and programme.

We align solutions with your design requirements and the relevant international standards, so you can sign off with confidence.

Support

We are more than consultants who simply issue a report. We stay involved through to verification:

Support during implementation of modifications and new designs.
Post-modification verification measurements to demonstrate that objectives are met.
Documentation for design reviews, internal governance, customer approval and regulators.

This end-to-end approach reduces technical risk and gives stakeholders evidence that the solution is proven, not assumed.

Specialist Vibration & Dynamics Services

This Vibration & Dynamics page acts as a hub. Each of the specialist services below can be expanded into its own detailed page.

Vibration Diagnostics & Root-Cause Investigation

We investigate unexpected high vibration, recurring failures and problematic operating modes on machinery and structures.

On-site diagnostics, vibration measurements and structured root-cause analysis.
Identification of the primary drivers (resonance, unbalance, misalignment, looseness, interaction effects).
Clear, prioritised recommendations for mitigation and further design work.

Learn more: Vibration Diagnostics & Failure Investigation.

Vibration Testing & On-Site Measurement

We characterise the real dynamic environment so that designs and assessments are based on measured data, not assumptions.

Operational vibration surveys over speed ranges, duty cycles and operating modes.
Spectral analysis, time histories and statistics aligned with relevant standards.
Data sets and reports suitable for design, qualification and compliance evidence.

Learn more: Vibration Testing & Measurement.

Structural Dynamics, Resonance & Modal Analysis

We focus on how structures behave dynamically and how to change that behaviour.

FEA of frames, platforms, supports and components to identify natural frequencies and mode shapes.
Experimental modal analysis and operating deflection shape (ODS) measurements.
Design changes to shift, separate or damp critical modes and remove resonant amplification.

Learn more: Structural Dynamics & Resonance.

Vibration Isolation, Mounting & Plinth Design

We design interfaces that control how vibration is transmitted and perceived.

Isolation systems and mounting arrangements for machines and sensitive equipment.
Plinth and foundation concepts that support both structural integrity and dynamic performance.
Solutions for transport isolation and shock/vibration protection where required.

Learn more: Vibration Isolation & Mount Design.

Fatigue, Durability & Design for Reliability

We assess and improve designs so that they survive the vibration environment over the intended life.

Dynamic stress assessment and fatigue life estimation for welds, brackets, frames and components.
Identification of hot-spot locations and critical details.
Design modifications to meet durability targets and reduce in-service failures.

Learn more: Fatigue & Reliability in Vibration.

Design Verification & Qualification Testing

We help you prove that your design meets customer specifications and international standards.

Test planning, instrumentation definition and acceptance criteria.
Execution and evaluation of vibration and shock tests to standards such as MIL-STD-810, RTCA DO-160 or client-specific requirements.
Traceable reports and evidence packs to support approval and certification.

Learn more: Design Verification & Qualification Testing.

Floor Vibration & Sensitive Equipment (VC Criteria)

We assess and mitigate floor vibration where precision tools and processes are at risk.

Floor vibration measurements and evaluation against VC criteria or tool-specific limits.
Identification of dominant sources and transmission paths.
Practical mitigation measures to enable reliable operation of sensitive equipment.

Learn more: Floor Vibration & Sensitive Equipment.

Who Is Behind Our Vibration & Dynamics Work?

We are an established and independent, chartered engineering–led company that resolves vibration and dynamics problems to comply with design requirements and international industrial standards in several industries. We are more than consultants: we support our customers through to verification and provide an end-to-end service.

Lead engineer

Paul Schmitz MBA CEng MIMechE MIoA
Chartered Mechanical Engineer and Member of the Institute of Acoustics.
Nearly 30 years specialising in vibration, structural dynamics and noise.
Extensive experience in measurement, analysis, design and verification.

Representative experience includes:

Oil & gas and petrochemical plant – compressors, pumps, pipework and structures.
Aerospace – engine frames, structures, equipment mounts and test rigs.
Automotive and commercial vehicles – chassis, brackets, body structures and attachments.
Telecommunications and data centres – equipment racks, supports and floor vibration.
Mining and heavy industry – conveyors, crushers, vibrating screens and plant structures.
Manufacturing and process industries – fans, blowers, HVAC, rotating machinery and support systems.

We are independent of equipment suppliers and vendors. Our role is to represent your interests, providing evidence-based engineering that can withstand detailed technical and commercial scrutiny.

This page was written by a Chartered Mechanical Engineer (CEng MIMechE, MIoA) with nearly 30 years’ experience in vibration and structural dynamics.
Last updated: November 2025

Recent Vibration & Dynamics Projects

Below are examples of recent work where we have applied the approach described above. Full details are available in our case studies.

API 619 Compressor Frame Resonance – Petrochemical Plant, UK

Problem: High vibration at specific speeds leading to repeated cracking of supports and unacceptable noise in nearby areas.
What we did: On-site vibration measurements, FEA of the frame and supports, identification of critical modes and redesign of stiffening and support details.
Outcome: Resonant response reduced significantly, vibration levels brought within ISO 20816 severity limits, noise in adjacent areas reduced by several dB(A), and no repeat cracking in service.

Floor Vibration for Sensitive Equipment – High-Tech Facility, Europe

Problem: Precision equipment unable to meet performance requirements due to floor-borne vibration exceeding VC criteria.
What we did: Detailed floor vibration measurements, assessment against VC-C/VC-D criteria, identification of dominant sources and paths, recommendations for isolation and layout changes.
Outcome: Floor performance improved to within the required criteria, enabling stable operation of sensitive tools without costly relocation.

Vehicle Structure Fatigue – Commercial Vehicle Manufacturer

Problem: Fatigue cracking of brackets and attachments on a commercial vehicle platform in service.
What we did: Vibration and strain measurements, FEA with model correlation, hot-spot identification and design modifications to details and attachment methods.
Outcome: Fatigue life increased to meet target mileage; warranty failures reduced and repair costs avoided.

Pumping Station Vibration – Utilities Sector

Problem: Excessive vibration on pump and pipework causing maintenance concerns and structure-borne noise.
What we did: Vibration survey, resonance assessment, design of modified supports and isolation details, followed by verification measurements.
Outcome: Vibration levels reduced to within recommended limits, with quieter operation and improved confidence in long-term reliability.

How We Work With You

Our aim is to provide clear, structured support from first conversation through to proven solution.

Initial contact
- Short call or online meeting to understand your problem, operating context and timescales.
- Review any existing information: photos, drawings, specifications, vibration plots or failure history.
Scope and proposal
- We define the most appropriate mix of measurement, analysis and design work.
- You receive a written proposal setting out scope, methods, deliverables and fees.
Execution
- Site work, measurements, analysis and design are carried out by a chartered engineer experienced in vibration and dynamics.
- We communicate progress clearly and highlight any emerging issues early.
Reporting
- You receive a clear report with evidence, conclusions and prioritised recommendations.
- Where relevant, we include assessment against standards and design requirements.
Implementation & verification
- We can support your team and suppliers during implementation.
- We provide verification measurements and updated documentation to demonstrate performance.

This structure gives you traceability from initial concern through to confirmed improvement.

Industries & Applications We Support

Vibration and dynamics problems arise in many sectors. Our experience includes:

Oil & Gas / Petrochemicals

Compressors, pumps, pipework, structures, API 619 compliance, piping resonance and dynamic loads.

Aerospace & Defence

Engine frames, structures, equipment mounts and test rigs, including qualification to standards such as MIL-STD-810 and RTCA DO-160.

Automotive & Commercial Vehicles

Chassis, brackets, suspensions, exhausts and body structures, with focus on durability and NVH.

Telecommunications & Data Centres

Equipment racks, cabinets and supporting structures, including floor vibration and structure-borne noise.

Mining & Heavy Industry

Crushers, conveyors, vibrating screens and plant structures in demanding environments.

Manufacturing & Process Industries

Fans, blowers, mixers, motors, HVAC systems and rotating machinery on frames and platforms.

Laboratories & High-Tech Facilities

Floor vibration control for microscopes, lithography tools and precision instruments using VC criteria and tool-specific limits.

We work across the UK, Ireland, Belgium, Germany and Scandinavia, and can support projects further afield by agreement.

Vibration & Dynamics Services Index

All detailed vibration & dynamics service pages are listed below.

Vibration & Dynamics — Frequently Asked Questions

What is the difference between vibration analysis and structural dynamics?

Vibration analysis focuses on the behaviour we can measure: vibration levels, frequencies, time histories and how they change with speed or load. Structural dynamics looks at how the structure itself behaves — its natural frequencies, mode shapes, stiffness and damping — and how to change that behaviour. Effective problem solving usually requires both: good measurements and a sound understanding of the structure.

When should I worry about vibration in my machinery or structures?

Warning signs include repeated failures or cracking, high vibration at particular speeds, operators noticing strong vibration or noise, and vibration levels approaching or exceeding limits in ISO 10816/20816, API, VC or OEM criteria. If you are derating equipment, restricting operating ranges or experiencing repeat repairs, it is usually time to investigate properly.

Which standards and design requirements do you work to?

We work to the standards and specifications that apply to your equipment and sector. These commonly include ISO 10816/20816 for vibration severity, API 619 and related API standards for compressors and rotating machinery, VC criteria for floor vibration, and environmental or product standards such as MIL-STD-810 and RTCA DO-160 where relevant. We also work with client-specific design requirements and OEM specifications.

Do you only provide advice, or can you also design the fix?

We are more than consultants issuing recommendations. We diagnose the problem, develop and assess design options, support the implementation of the chosen solution and carry out verification measurements afterwards. The goal is not just a report, but a proven, working solution.

Can you work with our in-house engineers and suppliers?

Yes. We routinely work alongside in-house engineering teams, OEMs, fabricators and contractors. Our role is to bring focused vibration and dynamics expertise that complements your existing capability and helps align everyone around a clear, evidence-based solution.

Which locations do you cover?

We are based in the UK and routinely support projects across the UK, Ireland, Belgium, Germany and Scandinavia. For suitable projects, we can also assist further afield by agreement, especially where analysis and remote support play a significant role.

What information should we prepare before contacting you?

Useful starting information includes: site location, equipment type and duty, operating speeds and conditions, any available vibration measurements, drawings or photos, and a brief history of the problem (what fails, how often, at what operating conditions). If you do not have this information yet, we can help you identify what is most important to gather.

Talk to a Vibration & Dynamics Specialist

If you are facing a vibration or structural dynamics problem — or want to ensure a new design is right first time — we are happy to talk.

We can review drawings, photos, existing plots and reports, and advise whether a focused site visit, measurement campaign or analytical study is the best next step. We are comfortable working under NDAs and within your internal governance processes.

Outline your vibration or dynamics issue.
Discuss timescales, constraints and what success looks like.
Decide on the most effective way to move forward.

Email the engineering team Request a call back