Whirling of an Automobile Propeller Shaft at Lower Speeds (2nd Report)

Numerical investigation of stopping maneuver for two by reversing propeller at different speeds

Maneuverability is an important aspect of marine vehicle design. With the development and utilization of ocean resources, maritime transportation is becoming increasingly busy. Stopping ability has great effect on the safety of ship maneuvering for those large ships. Therefore, it is necessary to study the behavior of the ship during the stopping maneuver to ensure the safety of navigation. In ...

The Influence of Plain Bearings on Shaft Whirling

Strength Check Analysis for Gear Shaft of Automobile Transmission

As the main drive components of the automobile transmission, the performance of gear shaft plays an important role on transmission performance. Aiming at the existing problems of the traditional strength check method of gear shaft, the objective of this study is to take a five-speed transmission as an example, to accomplish the strength analysis of gear shaft of the automobile transmission base...

2.1 Wilber's 2nd Lower Bound

Let 〈x1, x2, ..., xm〉 be the access sequence. For each access xj compute the following Wilber number. We look at where xj fits among xi, xi+1, ..., xj−1 for all i = j−1, j−2... that is, counting backwards from j − 1 until the previous access to the key xj. Now, we say that ai < xj < bi, where ai and bi are the tightest bounds on xj discovered so far. Each time i is decremented, either ai increa...

Lower limb perforator propeller flaps - clinical applications.

BACKGROUND A great variety of flaps have been used in lower limb reconstructive surgery: random pattern flaps, axial flaps and free microsurgical transfers with many variants. After further research on the cutaneous blood supply and improvement of microsurgical techniques, perforator propeller flaps began to be studied and used. MATERIAL AND METHOD A propeller flap is defined as an insular fl...