Determination of the impact force by the inverse analysis using acoustic response : in the case impact body is broken

2002 ◽  
Vol 2002 (0) ◽  
pp. 181-182
Author(s):  
Hidesato NISHIMOTO ◽  
Tomoaki TSUJI ◽  
Naotake NODA
Keyword(s):  
Inverse Analysis ◽  
Impact Force ◽  
Acoustic Response ◽  
The Impact

scholarly journals Study of special capacity in boxers with different styles of fight

2014 ◽  
Vol 18 (5) ◽  
pp. 3-7 ◽  
Author(s):  
V.V. Aksutin ◽  
G.V. Korobeynikov
Keyword(s):  
Impact Force ◽  
Relative Strength ◽  
Special Training ◽  
Left Handed ◽  
Right Hand ◽  
The Absolute ◽  
The Impact ◽  
Total Tonnage

Purpose : the determination of tendency in boxer to a certain style of fight is important at all stages. Material : The special capacity in boxers with different styles of fight were studied. The special capacity and the impact force were studied by special training equipment among 23 boxers of higher qualification. The absolute and the relative strength of serial and single strikes were studied. Results : the results indicated that the absolutely impact force, the total tonnage and the relative strength of his right hand of strikes in boxers-“strongman” are more higher than in boxers with different styles. In boxers-“player” the power-hitting left-handed is more increasing for different styles. This fact indicates the presence among boxers-“player” the left-handed persons. Conclusions : the presented data are indicated about more higher of special endurance in boxers-“fastest”. This group of boxers differs from other of more higher development speed endurance

scholarly journals Elements to improve theory of roller cutter bit with chisel teeth

2019 ◽  
pp. 42-47
Author(s):  
M. S. Vorobiov ◽  
B. S. Berezhnytskyi
Keyword(s):  
Impact Force ◽  
Interaction Force ◽  
Oblique Impact ◽  
Drill String ◽  
Tangential Component ◽  
Moment Of Inertia ◽  
The Moment ◽  
Maximum Impact Force ◽  
The Impact

The article deals with solving the problem of determination in the first approximation of the time of the interaction of tricone bit tooth with the rock and the maximum dynamic impact force. Considered the roller bit teeth are of types Sh and B. The shape of the bottom hole after the previous penetration the rock is adopted as having spherical mounds between paths. It is believed that deformations during the impact of the tooth occur only in the area of ​​the mounds, neglecting the masses of the rock material being deformed. The concept of the consolidated mass of the part of the rock, which is disintegrated and sections of the mass of the drill string with a roller bit is introduced. Separate consideration is given to determining the time and maximum impact force at the stages of sinking the rock and the raising of the tooth from it. In raising the plastic deformation of the material of the rock and its elastic return are taken into account. The determination of these parameters is carried out both without considering the moment of inertia of the roller bit, as well as taking into account this moment. It is shown that during the oblique impact of the tooth on the mound, taking into account the moment of inertia of the roller bit, it is necessary to know the coefficient of friction of the rocks over the tooth and the initial acceleration of the roller bit. In this case, the normal and the tangential component of the force of the specified impact of the tooth on the mound is considered separately. Were suggested analytical dependences for determination of the normal and tangent component of the shock interaction force module, as well as their maximum value.

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