摘要：
“The B-21 was a digitally designed bomber from day one, meaning the company abandoned the traditional means of designing aircraft on paper, CAD files and clay models and embraced the new era of digital engineering.
The technique uses computer modeling and data that represent the characteristics of complex systems. Engineers can run component tests on computer simulations rather than building real-world equivalents, which takes time and money.
Developers can then create an entire computer-simulated aircraft — what’s known as a “digital twin” — on which to run tests.
“We iterated on thousands of designs for this aircraft in a digital environment before selecting the design that would go forward,” Warden said.”
