scholarly journals Dynamic analysis of the reciprocating compressor package on the offshore platform

2017 ◽  
Vol 232 ◽  
pp. 012015
Author(s):  
Y Zhao ◽  
W Wang ◽  
Q Zhou ◽  
J Feng ◽  
X Jia ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Offshore Platform ◽  
Reciprocating Compressor

Vibration and Shock Loads Assessment of the Reciprocating Compressor on an Offshore Platform

2015 ◽  
Author(s):  
Abe Nezamian
Keyword(s):  
High Harmonic ◽  
Offshore Platform ◽  
Oil Field ◽  
Mechanical Equipment ◽  
Reciprocating Compressor ◽  
Supporting Structure ◽  
Shock Absorbers ◽  
The Common ◽  
Offshore Oil ◽  
Manifold System

The Reciprocating Compressor is becoming one of the common classes of mechanical equipment and plays an important role in offshore oil field re-vitalisation. A wide variety of vibration and failure problems may occur in reciprocating compressors, associated supporting frames and offshore support structure. Excessive vibration problems usually occur when a mechanical natural frequency of the support structural system or compressor manifold system is excited by a pulsation or mechanical excitation source. Since reciprocating compressors generate high pulsation levels at numerous harmonics, which in turn produce shaking forces, vibration and failure problems in these systems are common. These can lead to failures of the compressor, bearings system and or offshore supporting structure/platform. In addition, special problems can occur due to the torsional natural frequencies and the high harmonic torques, due to the compressor loading. Shock absorbers can be designed to control and mitigate the vibration from the compressor applied to the supporting structure. In order to design an appropriate number and location for shock absorbers, it is important to determine the vibration characteristics of the reciprocating compressor on the offshore platform and assess the interactions between it and the supporting structure. This paper gives an overview of the challenges and also discusses various aspects of vibration and shock load assessment of the reciprocating compressor on an offshore platform. Application of the proposed methodology were presented for an offshore structural unit.

Bedrock Depth Effect Investigation in Seismic Response of Offshore Platforms Considering Soil-Pile-Structure Interaction

2007 ◽  
Author(s):  
B. Asgarian ◽  
M. A. Roshandel Tavana ◽  
R. H. Soltani
Keyword(s):  
Dynamic Analysis ◽  
Seismic Response ◽  
Ground Motion ◽  
Earthquake Engineering ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Analysis ◽  
Offshore Platform ◽  
Offshore Platforms ◽  
Structure Interaction ◽  
Strong Ground

Offshore platforms in seismically active areas should be designed to survive severe earthquake excitations with no global structural failure. In seismic design of offshore platforms, it is often necessary to perform a dynamic analysis that accounts for nonlinear soil-pile-structures interaction effects. Nonlinear dynamic analysis for offshore structures has been a major challenge in marine structural and earthquake engineering. In this paper, nonlinear dynamic analysis of jacket type offshore platforms considering soil-pile-structure interaction subjected to strong ground motion have been studied. A jacket type offshore platform is included of piles, jacket and topside with different behaviors in seismic loading. Both jacket and pile elements have been modeled using fiber cross-sections. In this paper, free field ground motion analysis with respect to bedrock excitations has been done using nonlinear stress-strain relations for soil. This model has been developed using Open System for Earthquake Engineering Simulation (OpenSEES) software. In this paper, nonlinear seismic response analysis of an existing sample offshore platform in Persian Gulf subjected to strong ground motions in different bedrock depths has been performed and the results in terms of lateral deflections of platform, soil layers displacement-time history and acceleration response spectra of pile head, top of jacket and deck have been presented.

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.

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