scholarly journals Numerical dynamic analysis of reciprocating compressor mechanism. Parametric studies for optimization purposes

2017 ◽  
Vol 105 ◽  
pp. 1-14 ◽  
Author(s):  
A. Pont ◽  
J. López ◽  
J. Rigola ◽  
C.D. Pérez-Segarra
Keyword(s):  
Dynamic Analysis ◽  
Reciprocating Compressor ◽  
Parametric Studies

A New Method for Dynamic Analysis of Mistuned Bladed Disks Based on the Exact Relationship Between Tuned and Mistuned Systems

2002 ◽  
Vol 124 (3) ◽  
pp. 586-597 ◽  
Author(s):  
E. P. Petrov ◽  
K. Y. Sanliturk ◽  
D. J. Ewins
Keyword(s):  
Dynamic Analysis ◽  
Frequency Response Function ◽  
New Method ◽  
Test Cases ◽  
Finite Element Models ◽  
Bladed Disks ◽  
Sector Model ◽  
Bladed Disk ◽  
Parametric Studies ◽  
Exact Relationship

A new method for the dynamic analysis of mistuned bladed disks is presented. The method is based on exact calculation of the response of a mistuned system using response levels for the tuned assembly together with a modification matrix constructed from the frequency response function (FRF) matrix of the tuned system and a matrix describing the mistuning. The main advantages of the method are its efficiency and accuracy, which allow the use of large finite element models of practical bladed disk assemblies in parametric studies of mistuning effects on vibration amplitudes. A new method of calculating the FRF matrix of the tuned system using a sector model is also developed so as to improve the efficiency of the method even further, making the proposed method a very attractive tool for mistuning studies. Various numerical aspects of the proposed method are addressed and its accuracy and efficiency are demonstrated using representative test cases.

scholarly journals Dynamic analysis of reciprocating compressor system with translational clearance and time-varying load

2017 ◽  
Vol 16 ◽  
pp. 7-12
Author(s):  
Shungen Xiao ◽  
Mengmeng Song ◽  
Haixia Song ◽  
Lixia Huang
Keyword(s):  
Dynamic Analysis ◽  
Time Varying ◽  
Reciprocating Compressor

scholarly journals Analysis and dynamic behavior of portal structures due to reciprocating machine

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Essen Donald ◽  
Dwi Pratama Andreas
Keyword(s):  
Free Vibration ◽  
Dynamic Analysis ◽  
Vibration Analysis ◽  
Free Vibration Analysis ◽  
Reciprocating Compressor ◽  
Machine Foundation ◽  
Final Project ◽  
Reciprocating Engine ◽  
Long Time ◽  
Engine Start

reciprocating engine consists of two driving parts, piston and rotor, when the engine start these two parts move with a certain frequency, resulting in vibrations in the structure. dynamic analysis of the structure aim to find out how the structure behaves due to vibrations generated from the machine, whether the structure is safe for the machine and humans around the machine due to the amplitude of displacement, velocity, and displacement from structure. This dynamic analysis is carried out with the help of SAP 2000 v20.20 software with a dynamic load in the form of a reciprocating compressor operating with a frequency of 49.16 Hz. In this final project, the machine foundation uses a table top type with 1x1.7 m column dimensions and 1.3x1.6 m beams. From the free vibration analysis, the result is a natural frequency structure, from the first ten modes the structure is declared safe from resonance However, in this study the displacement and velocity of structures that occur in the zone B & C while the acceleration into the safe category based on applicable standards. This means that the structure is safe for humans who are around but are not safe for the product and the machine itself if it operates for a long time continuously.

scholarly journals Dynamic Analysis of Gear Pairs with the Effects of Stick-slip

2021 ◽  
Author(s):  
Chao Xun ◽  
He Dai
Keyword(s):  
Dynamic Analysis ◽  
Vibration Velocity ◽  
Sliding Velocity ◽  
Mesh Stiffness ◽  
Stick Slip ◽  
Gear Teeth ◽  
Tooth Surfaces ◽  
Parametric Studies ◽  
Frequency Components ◽  
Heavy Loads

Abstract A stick-slip dynamic model of a two-gear set is proposed. In this model, time-varying mesh stiffness, tooth separation, friction between the gear teeth surfaces and potential stick-slip are considered. Considering the contributions of the vibration velocity to the gear teeth sliding velocity, transition conditions between the stick state and slip state are revealed. Dynamic analysis shows that, when stick appears, the vibration amplitudes are dramatically increased, and tooth separation occurs. Additionally, stick also induces half-frequency components of the mesh frequency and causes chaos. Parametric studies show that heavy loads and rough tooth surfaces increase the probability of stick and increase the time of the stick state over a single mesh period. However, due to the complex nonlinearity, the existence of a certain relationship between the gear rotation speed and the stick time is not confirmed.

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