An accurate choice of the design model crank-connecting rod mechanism piston internal combustion engines affects accuracy calculation results and their complexity. At present, most scientists technicians choose a two-mass to analyze operation crankconnecting mechanism. The considers only rotational reciprocating movements two masses, which are connected by rigid weightless rod. This significant...

The dynamic characteristics of deflectable nose missiles with rotary single-channel control were investigated in this paper. Firstly, the effective angle of attack, effective angle of sideslip and quasi-body coordinates were introduced based on the spin characteristics of the missile’s body. Secondly, considering the interaction between the missile’s nose and body, the rigid kinetic model of mi...

This paper is concerned with investigation of vertical impedance function of a surface rigid circular foundation resting on a semi-infinite transversely isotropic alluvium. To this end, the equations of motion in cylindrical coordinate system, which because of axissymmetry are two coupled equations, are converted into one partial differential equation using a method of potential function. The g...

Abstract In this paper, the dynamical similarity of multi-block catenary arches and columns is discussed, which can be used for simplified design rocking arches. The basic hypothesis that dynamic response similar when shape arch follows thrust line, i.e. it a arch. It validated numerically responses slender are safe reliable approximations those not then overturning acceleration (response) spec...

The axisymmetric steady state deformations of an infinite cylindrical rod made of a rigid/perfectly plastic material and striking a known cavity in a rigid target are analyzed by the finite element method. The contact between the deforming rod and the target surface is assumed to be smooth. It is found that the axial force experienced by the rod depends strongly upon the square of its speed. Re...

Shake table testing of a 1/5 scale model of a slender bridge steel truss pier that uses a controlled rocking approach as a means of seismic protection was conducted. The controlled rocking approach allows the pier to uplift from its base while passive energy dissipation devices steel yielding devices or fluid viscous dampers are implemented across the uplifting location to control the response....

  Background: The aim of this study was to determine the treatment outcome of humeral shaft fractures with a locked rigid intramedullary nail in patients indicated for surgical treatment. Methods: In this descriptive-cross sectional study, all patients were followed up for one, six, and 18 months post operatively. The Short Form Questionnaire (SF-36) and Constant Shoulder Score were applied. Re...