supported by National Natural Science Foundation of China (Grant No. 51175452);Hebei Provincial Natural Science Foundation of China (Grant No. E2012203061)
The control manner during the process to ensure the quality of pipe products mainly relies on the operator’s experience, so it is very necessary to study the setting round process and obtain its spring-back law. The ...
supported by National Nautural Science Foundation of China(Grant No.50775002);Key Science and Technology Research Program of Beijing Municipal Commission of Education of China(Grant No.KZ200910005003)
All-position robots are widely applied in the welding of complicated parts.Welding of intersecting pipes is one of the most typical tasks.The welding seam is a complicated saddle-like space curve,which puts a great ch...
This project is supported by National Natural Science Foundation of China(No. 10272007, No.60404017, No.10372009)Municipal Natural Science Foundation of Beijing, Clina(No.4052008).
The multi-modes and disperse characteristics of torsional modes in pipes are investigated theoretically and experimentally. At all frequencies, both phase velocity and group velocity of the lowest torsional mode T(0,...