Long service time and excessive vibration of aero-engine will cause failure clamps, which usually fix pipelines on the outside an aero-engine. In this paper, nonlinear characteristics caused by loosening clamps in pipeline are determined. According to real parameters clamp-pipeline test rig, clamp is simplified into a spring-damping. Thus, model based cubic stiffness established. The multi-scal...

Processive chromosomal replication relies on sliding DNA clamps, which are loaded onto DNA by pentameric clamp loader complexes belonging to the AAA+ family of adenosine triphosphatases (ATPases). We present structures for the ATP-bound state of the clamp loader complex from bacteriophage T4, bound to an open clamp and primer-template DNA. The clamp loader traps a spiral conformation of the ope...

Aiming at the problem that suspension clamp is difficult to be quickly replaced due heavy load of when replacing transmission line wire in UHV live operation, this paper develops an auxiliary device for realizing rapid replacement conductor clamp. Through design fixtures suitable installation wires and connecting plates, transfer can realized, separated under condition no force. The flexible li...