Dynamic stability of a rotating asymmetric cross-section blade subjected to an axial periodic force

2003 ◽  
Vol 45 (9) ◽  
pp. 1467-1482 ◽  
Author(s):  
Gürkan Şakar ◽  
Mustafa Sabuncu
Keyword(s):  
Dynamic Stability ◽  
Cross Section ◽  
Periodic Force

Influence of Shape of Coarse Aggregate on Performance of Open Graded Friction Course

2011 ◽  
Vol 239-242 ◽  
pp. 3266-3274
Author(s):  
Jin Xi Zhang ◽  
Chao Wang
Keyword(s):  
Wear Resistance ◽  
Bulk Density ◽  
Dynamic Stability ◽  
Cross Section ◽  
Coarse Aggregate ◽  
Void Content ◽  
Horizontal Cross Section ◽  
Important Material ◽  
Large Bulk ◽  
Open Graded Friction Course

As a new kind of pavement material, the Open Graded Friction Course (called OGFC) has many advantages, and so is rapidly popularized in China recently. However, the performance of OGFC decreases with the utilization of road, such as the decrease in permeability, durability and so on. In the present study, the influence of the shape of coarse aggregate, which is the most important material in OGFC, on the performance of OGFC was investigated in laboratory. The shape of coarse aggregate is indicated by the bulk density and total 4 kinds of aggregates with different bulk density were produced artificially and tested in this study. When the shape of coarse aggregate changed, the wear resistance and dynamic stability of OGFC also changed lightly. The bulk density of aggregate has no serious influence on the void content, but has obvious influence on the permeability of OGFC. The shape of continuous void in horizontal cross-section becomes rounder when the aggregate with large bulk density is used. The rounder continuous void is benefit for the flowing of water, so the permeability of OGFC is improved.

scholarly journals CALCULATION OF PARAMETRICAL VIBRATIONS OF A SHIP SHAFT LINE SUBJECT TO RIGIDITY OF A STERN BEARING

2017 ◽  
pp. 108-114
Author(s):  
Alexander Alekseevich Migunov ◽  
Victor Andreevich Mamontov ◽  
Aleksey Aleksandrovich Khalyavkin
Keyword(s):  
Dynamic Stability ◽  
Cross Section ◽  
Design Model ◽  
External Loading ◽  
Propeller Shaft ◽  
Shaft Line ◽  
Mathieu’S Equation

The paper studies parametrical vibrations of the ship shaft line, which arise because of harmonical change in time of rigidity of a propeller shaft and a stern bearing. The design model of a propeller shaft shows a beam with a cross section constant along its length, which leans on hinged immovable and springy support simulating a stern bearing. At the end of a beam there is a disk simulating a propeller screw. Parametrical vibrations arise due to the external loading and as a result of amortization of the stern bearing. In the analysis of parametrical vibrations of the ship shaft line there are used Mathieu's equation and Strutt-Ince diagram. Dynamic stability of a ship shaft line is defined subject to a gap between a propeller shaft and a stern bearing.

Small oscillations of systems with one degree of freedom

2020 ◽  
pp. 175-190
Author(s):  
Gleb L. Kotkin ◽  
Valeriy G. Serbo
Keyword(s):  
Differential Cross Section ◽  
Potential Energy ◽  
Harmonic Oscillator ◽  
Cross Section ◽  
Differential Cross ◽  
Travelling Wave ◽  
Fast Particle ◽  
Free Oscillations ◽  
Periodic Force ◽  
Small Oscillations

This chapter addresses the small free oscillations for particle moving near the minimum of the potential energy, an oscillator with friction under action of a given force, and the stable oscillations of an oscillator which is acted upon by a periodic force. The authors also discuss the differential cross section for the oscillator which excited to an given energy by a fast particle and a harmonic oscillator in the field of the travelling wave.

Small oscillations of systems with one degree of freedom

2020 ◽  
pp. 25-28
Author(s):  
Gleb L. Kotkin ◽  
Valeriy G. Serbo
Keyword(s):  
Differential Cross Section ◽  
Potential Energy ◽  
Harmonic Oscillator ◽  
Cross Section ◽  
Differential Cross ◽  
Travelling Wave ◽  
Fast Particle ◽  
Free Oscillations ◽  
Periodic Force ◽  
Small Oscillations

This chapter addresses the small free oscillations for particle moving near the minimum of the potential energy, an oscillator with friction under action of a given force, and the stable oscillations of an oscillator which is acted upon by a periodic force. The authors also discuss the differential cross section for the oscillator which excited to an given energy by a fast particle and a harmonic oscillator in the field of the travelling wave.

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