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End of 2017 Reflection News letter
22 December 2017
End of 2017 Reflection News letter

 

Welcome to our December newsletter.

Now that we are nearing the end of the year, it seems appropriate to look back on the past twelve months and reflect on all the wonderful events that have taken place within DC White.
We've seen a change in ownership, office location and have even now officially had a name change. Moving forwards into deeper more exciting waters.

More importantly, the projects we have worked on this year have been phenomenal and all thanks to our wonderful clients. We have worked with the likes of Tata steel, GE Power, Cristal Pigments UK and many more. All of which have been a pleasure to work with.
We look forward to hopefully working with such wonderful companies again in the coming year.

We wish you all a Merry Christmas and a happy New Year.

Thanks for reading,
The DC White team

 


NEW Recovib Update!

The Recovib range has had an upgrade! The Recovib Tiny and the Recovib Feel are now compatible with your Android or Apple Smart phone. This new feature now allows you to easily and quickly view the data received from your sensors. What's more is that you will not need to update the software on your current sensors to be able to use the app, just download and go.

That is not all though, when purchasing your Recovib sensors you will also receive the Recovib Viewer. Don't let the name confuse you though, this software does a lot more than just allow you to view your results.

The provided software allows for millisecond level time synchronisation between sensors. It is also possible to select the start time, the duration and the sensitivity of the measurement.

Once the data has been extracted, you can replay it in a data viewer, on your smartphone or your PC. The viewer allows for a detailed analysis of the vibrations recorded in the time domain and in the frequency domain.

Various signal processing options are available: high-pass, low-pass and band-pass filters, integrator filters (velocity mode) and dual-integrator filters (displacement mode).
In the frequency domain, there are a number of possible FFT-based computations:

  • Amplitude Spectrum Peak and RMS
  • Power Spectrum
  • Power Spectral Density
  • Amplitude Spectral Density.

Or if you still prefer to analyse your data in your own preferred software, you can still export the data into the format of your choice.

Read October's "From Capris to Canals" newsletter
17 October 2017
Read October



Welcome to our October newsletter. 


We have now moved into our new offices near Guildford and the team has settled in well. Tom Jowett, who has recently taken the reins from Doug, has been incredibly busy during the move. However he did manage to take the time to answer a few questions to help us get to know him better and understand his aspirations for DC White CE. 

We also have had two new brilliant minds join our team over these past few weeks! A very warm welcome to both Paul Maher and Krystal Shaw who are both guaranteed to be great assets to our DC White team. 

Paul has extensive experience in the Oil & Gas industry as well as working in aeronautical and rail. Paul brings strong project management, planning and design skills to the team. 

Krystal has joined our team as Marketing Assistant, ensuring our site is up to date and easy to find for new and existing customers.

Also in this newsletter is the latest case study featuring the new Tiny vibration recorder.


Thanks for reading,
The DC White team


Q&A with Tom Jowett, DC White CE's new owner and MD.

We sat down with Tom to find out a bit about him and his plans for the business:

Q1. Can you tell us about your new role and history with DC White?

I am delighted to become the new owner of DC White Consulting Engineers. I've been with the company for six years now, starting off as a project engineer, making my way up the ladder over the years. I was delighted when Doug approached me to take over the business - the fact that he felt I had the skills and knowledge to follow in his footsteps and take the business forward was a huge personal achievement. 

Q2. What’s your background in engineering and what do you enjoy most about it?

I studied Motorsport Engineering in Bristol for 5 years, graduating with a First Class Master’s degree. I was involved with construction from a young age: however, it was owning my beloved Ford Capri that developed my passion for engineering. Fortunately, my long loved motor had a tendency to break down, and realising how much I enjoyed repairing it led me into engineering!

Q3. What motivates you?

I've been greatly inspired by Doug over the years: his 45+ years of skills and expertise in engineering showed me what an incredibly rewarding career running my own engineering firm could offer. He also gave me a lot to live up to: whilst there will only be one Doug,  I understand from him very clearly the values that DC White CE must endure to continue to deliver real value for our clients.  

Q4. How do you see DC White moving forward?

My objective right now is to drive steady growth for the business. With our team consolidating their knowledge based skill sets, the most important thing is to provide continuity to our clients. We'll focus on delivering excellence in our core services including engineering design, vibration, piping, failure analysis and FEA services. However, I also want to really get behind the new accelerometers and vibration recorders from Micromega - they are fantastic new products that complement our core skill sets, and offer real value in the market.


Q5. Will Doug still be involved in any of the company capacity.

Doug is no longer involved with the day to day running of the company, however he has taken the role as Principal Consultant for us and still remains a shareholder with the company, also adopting the position of Non-executive Chairman of the Board. He is claiming himself a well-deserved (partial) rest after his many previous attempts to retire!

Q6. What are you most proud of?

Having a group of engineers that are so dedicated to the company makes me really proud. Office moves are never easy, but I am so pleased the entire team has made the 17 mile move to the new offices in Guildford and everyone has worked their socks off to minimise the disruption to our clients. Clearly we have team that is very invested in the future of DC White CE - a happy, strong team is the key for a smoothly run business. 

Vibration Case Study
RECOVIB Tiny used on a Pedestrian Bridge in Tours, France

The footbridge at Tours

 

In the city of Tours, in France, a new footbridge has been constructed. As part of  commissioning, vibration measurements are carried out. By means of modal analysis,  dynamic parameters up to 6 Hz of the footbridge are identified:


Natural frequencies for all detected eigenmodes,

Damping ratios for all detected eigenmodes,

Mode shapes for all detected eigenmodes.

To perform this, the company Wölfel Engineering uses the RECOVIB Tiny to measure the  bridge vibrations. Thanks to RECOVIB Tiny, you no longer need to unwind metres of cables or install sophisticated  wireless networks.

A shaker system is used for excitation of the bridge structure with two different orientations: in horizontal lateral direction and in vertical direction.

Nine RECOVIB Tiny are fixed to the bridge thanks to the magnets


 For details of measurements and full evaluation, read on.


Latest design case study for Dustech
09 June 2017
Latest design case study for Dustech Design Substantiation for Dustech, a global leader in environmentally friendly dust control and a long-standing client of DC White CE, approached us for a substantiation of their C1558B Wheat Starch Bag Filter. 

 

The work was done at design stage, to ensure any issues would be addressed before expensive tooling or manufacturing had occurred. Using their drawings and 3D model as reference, we produced a 3D model using ‘shell elements’. We then exported it into MIDAS finite element analysis software, where we applied thicknesses to the model, set boundary conditions and applied the required internal pressure. Self-weight, buckling and hoisting analyses were then performed. 

 

The design passed the substantiation requirements, documented in our report with detailed findings of the analyses. This job is a good example of the essential bread and butter work we do, giving clients’ confidence that their designs are up to the task and critically ensuring that changes, where required, are captured at the earliest stage in a product’s development. Specifically, we regularly substantiate a range of bag filter designs destined for a wide range of industries. 


 

Figure shown: Von Mises stress plot (with exaggerated deflections) of the bag filter with the self-weight and internal pressure applied.

New Design Optimisation Case Study
27 April 2017
New Design Optimisation Case Study Cafeteria Seating gets a Ruggedized Re-design

When a market leader in educational seating approached us to assess proposed design developments and optimise the design of one of their ABS plastic products, we needed to apply some lateral thinking. The ABS plastic seats were cracking around the mounting post and concern was raised as to whether different methodologies for attaching the seats to the metal posts was causing the cracking, or increasing the likelihood of cracking occurring.
  
There is a saying that you should "never under-estimate the ingenuity of stupidity", but when designing for the education market we needed to think more along the lines of "never under-estimate the ingenuity of abuse a youngster can apply to your design". Our starting point was to look at the range of sizes and weights of users, as teachers may use the seats as well as students. We then considered what a 'reasonable level of abuse' was to apply to the seat surface and decided that a person standing on the edge of the seat was a foreseeable event.

Using finite element analysis software we prepared computer models of three seat designs and evaluated the resulting stress plots to determine percentage improvement in the different design stages. The second developmental design from the client was 14% stronger than their initial design. Our 'optimised design' was able to minimise the amount of additional material required and also reduced the modifications needed to the seat moulds. 
The 'optimised design' was 36% stronger than the client's second design and 55% stronger than the initial design, which in real terms means it would need a person weighing 232Kg sitting on our design to break it. Though the different methods for seat attachment in the USA and Europe did not cause the cracking, we were able to prove that in the USA, they were applying almost 100 times the necessary force into the seat attachment bolt.

The client was very happy with the suggestions of our 'optimised design' and has requested 'design optimisation of more of their products.



To chat informally with an engineer about your analysis needs or request a quotation, call us on 01252 811641 or email us



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DC White Consulting Engineers
PM House
Riverway Estate
Old Portsmouth Rd
Peasmarsh
Guildford, UK
GU3 1LZ
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