| Reciprocating compressor is the most important in the production of petrochemical equipment, often used to drive the gas or compress the gas in order to meet the needs of technological process. The reciprocating compressor piston periodic reciprocating movement, result in certain gas pulsation existing in the pipeline, when the gas pulsation meet the saltation of pipe structure will produce vibration force, that cause the vibration of the pipeline. Vibration will affect the normal production of the enterprise, moreover lead to major accidents such as support fracture or pipe leaks. The study of gas pulsation of reciprocating compressor piping system has important practical value. Jacket platform is the necessary way and tools to the exploitate the Marine resources, due to the complexity of structure, it is very difficult to monitor the platform condition. Acoustic emission technology is much easier and convenient than other nondestructive testing technology, so it is the inevitable trend to monitor the health of jacket platform. Researching the mechanism of acoustic emission in platform overwater truss structure is very important.Part1is the gas pulsation of reciprocating compressor piping system research. Analysing the gas pulsation incentive mechanism and the pipeline vibration process, according to the fluid motion equation, the gas pulsation of pipeline structure in different unit was deduced. Theoretical calculation method was applied to analyse the gas pulsation of a petrochemical plant device, and puting forward a scheme to inhibit the gas pulsation. It is verified the effectiveness of the gas pulsation analysis by the actual effectPart2is the mechanism of acoustic emission in offshore platform overwater truss structure research. Starting from the theory of elastic wave, the characteristic and law of acoustic emission transmission in hollow cylinder was deduced according to the common jacket platform. Using the acoustic emission signal acquisition system and the simulated acoustic emission source to carry out the T tube structure and the welding structure test, the angle of welding and welding structure is studied in the spread of the acoustic emission. |
