Innovation et gestion de programmes synchronisée et collaborative pour les nouveaux programmes
Land Rover BAR is a commercial sporting team led by Olympic gold medalist and 34th America’s Cup winner, Sir Ben Ainslie. Launched in June 2014, the team’s long-term aim is to bring the prestigious America’s Cup back to Britain, where the first challenge was held in 1851 off the Isle of Wight.
For three years, Siemens Digital Industries Software’s product lifecycle management (PLM) software has been underpinning Land Rover BAR’s ambitious project to design, evaluate, verify and produce a winning America’s Cup Class (ACC) catamaran on time and on budget.
The motto for Land Rover BAR (Ben Ainslie Racing), based in Portsmouth, England, is, “Bring the cup home.” The goal is to return the America’s Cup to Portsmouth where the yachting race first took place in 1851. “As a new team, it has been a fantastic journey so far,” says Martin Whitmarsh, chief executive officer (CEO), Land Rover BAR. “We won the America’s Cup World Series and we go into the final qualifying with a two-point advantage.”
After more than 85,000 hours of design and build across multiple disciplines, Land Rover BAR has a 15-meter racing boat that includes 1,200 meters of electronic and electrical cabling connecting 190 sensors and four video cameras. R1, also known as Rita, was launched in Bermuda in February, 2017, three months before the start of the 35th America’s Cup. After the inaugural sail, Olympic medalist and 34th America’s Cup winner, Sir Ben Ainslie, who is team principal and skipper, commented, “It’s a massive day for the team to get our race boat out on the water sailing for the first time, and it was a really, really promising sail.”
Simon Schofield, design manager, Land Rover BAR, adds, “The boat is in the water but we are still developing parts every day, iterating very quickly, coming up with new shapes within NX and manufacturing very quickly.” During the countdown to the first race, intensity increases as the engineering team focuses on optimizing performance. Whitmarsh states, “Our aim is still to make the boat faster and Siemens Digital Industries Software is enabling us to do that.”
Land Rover BAR can make last-minute changes because it has an integrated virtual environment for digital modeling and simulation, using solutions from product lifecycle management (PLM) specialist Siemens Digital Industries Software. These include NX™ software for product design, Teamcenter® software for data management, the Fibersim™ portfolio of software for composites engineering and the Simcenter™ software portfolio, which incorporates Simcenter Femap™ software and Simcenter STAR-CCM+® software for engineering analysis and computational fluid dynamics (CFD) analysis.
Land Rover BAR has gained clear benefits by building up its Siemens Digital Industries Software toolset over the past three years. “Our Siemens Digital Industries Software toolset is now mature and we have done the background work of developing models and proving engineering processes,” says Schofield. “As a result, we might spend a few days on a task instead of a month. For example, we have a scripted process between Fibersim and NX to produce templates and patterns for plybooks. This is automated at one click so it is not only quicker, it is less prone to mistakes.”
By using Teamcenter as the digital thread for managing engineering processes, team members know they are all working with a single source of data. Whitmarsh comments, “For a team of 30 to 35 design engineers, it is very important to have a high-level tool that allows us to share information in a relatively fast-moving environment. We race over a period of a month and each day the boat will be different. We can change hydrofoils up to the morning of the race.”
The PLM solutions from Siemens Digital Industries Software have enabled Land Rover BAR to create a virtual racing boat, known as the digital twin, which the design team can rapidly evaluate and modify. Land Rover BAR has an as-built configuration, a digital twin of each possible configuration of the boat. In the weeks preceding the race, as designers are still finalizing the dagger boards, they can ensure that each configuration maximizes the degrees of freedom (DOF) yet remains firmly within the window of compliance.
The software that enables Land Rover BAR to conduct CFD analysis is Simcenter STAR-CCM+, and Rodrigo Azcueta of the concept team is a long-time user. “We make design decisions about the shape of components based on CFD analysis,” he explains. “Hydrodynamic shapes deform if they are too light and thin, so we need to understand how heavily components are loaded and how far can they be pushed to give the best performance.”
One of the most challenging areas is the coupling of flow with structural integrity, known as the fluid-structure interaction. “We have to understand consequences; for example, what else changes when a structure deforms? It is not a state of steady flow,” comments Azcueta. The team also has to contend with cavitation, a physical phenomenon that occurs in water when flow accelerates around a profile, such as a rudder, and pressure drops. Cavitation bubbles appear, creating drag and as a result, the boat hits a speed limit. “Cavitation is a problem that we aim to predict and avoid through modeling, and Simcenter STAR-CCM+ makes this possible,” says Azcueta.
Multiple simulations, some lasting a few hours and others taking up to a day, are running 24/7 using a cluster of highperformance computers. America’s Cup rules do not allow a team to have an endless selection of real components, but the team can build as many virtual components as they want. Although the design of large components such as dagger boards must be frozen three months before the first race to allow time for manufacturing, the team is still able to work on smaller components in the final few weeks.
Andy Claughton, chief technology officer (CTO), Land Rover BAR, says, “From my point of view, we are reaping the benefit of groundwork that we’ve done because all our modeling is parametric. Because these racing boats are so complex, we need to be precise, especially as we are manufacturing at different sites away from our own base. Despite the complexity, we have compressed the time spent on producing drawings and can quickly go from a design shape to a manufactured drawing, and this means that we can delay decision making as much as possible. That is a key advantage with regard to the dagger boards, which are the main performance differentiators.”
The dagger boards are made from numerous layers of carbon fiber built up from a mold in a time-consuming process that involves the machining and scanning of surfaces. The design team must also allow for the thermal distortion that occurs during manufacture, and update machining files accordingly. “The accurate handling of geometries is the main reason that we originally chose NX, which allows us to easily continue defining and refining geometry,” explains Claughton.
With Teamcenter supporting all Land Rover BAR’s development work, designers and engineers in Bermuda and Portsmouth are seamlessly accessing the same design details and progress reports.
Teamcenter plays a particularly significant role in helping manage compliance. Instead of a time-consuming process involving manual input, scanning and checking, each submission is made with the click of a button. Teamcenter is used to store the certificates issued for each individual part. Because it holds a set of preapproved compliance documents for each potential racing configuration, Teamcenter is used to demonstrate compliance whenever the boat is physically checked and measured by referees.
“Considering that we had no legacy knowledge, the Siemens Digital Industries Software toolset has done exactly what we hoped it would do,” confirms Claughton. “We are all working together in a consistent and integrated manner and that is a standout success for Land Rover BAR. Our workflow is entirely in the Siemens Digital Industries Software environment; nobody is running separate applications here and there.”
Schofield comments, “When we see other boats we can model something very quickly to assess whether we need to worry or not. Other teams are obviously doing the same, but we are much more integrated with streamlined workflows. We are the most integrated team and this gives us agility.”
Ainslie is completely focused on performance: “We can see a lot of the upgrades coming together and increasing our performance markedly, which is where we need to be.” Whitmarsh concludes, “The America’s Cup is the most exciting race on water, the pinnacle of sailing by the best teams in the world. It is also an engineering race and the Siemens Digital Industries Software toolset is helping us to move closer to winning.”