Study On The Noise Of Jack-up Drilling Platform Living Quarter Cabins

It is an ocean world today, and Jack-up drilling platform as the backbone ofoffshore oil mining, plays an important role that cannot be ignored. In order to protectthe equipment instrument of the Jack-up drilling platform to operate normally andmake the work personnel’s living environment and working environment healthy,ocean drilling platform vibration noise control processing problems become more andmore important.This paper is aimed at analyzing and predicting the layers of cabins’ soundpressure level of the living quarter of Jack-up drilling platform, and providingcorresponding noise control solutions. Contrast each layer of the cabins’ soundpressure level before and after vibration noise control treatments by correspondingnoise control solutions. Target cabins’ sound pressure level complies with therequirements of the IMO noise control criterion, and expectes to reach the effect ofnoise reduction.The specific research works are as follows:1. Summarized the methods of noise control treatments of offshore platformstructures and the basic concept of noise and the relevant acoustic equations, providedthe noise prediction and treatment process of the Jack-up drilling platform livingquarter’s cabins.2. To establish a FEM model base on MSC.PATRAN/NASTRAN and an acousticanalysis model base on VA One. Set the corresponding parameters, it is concluded thatthe target cabin noise sound pressure level of numerical prediction.3. Introduced the basic theory and methods of the noise process control before thetarget cabin noise control treatments. It formed floating structure by using flexibleconnection form instead of rigid connection form in the VA One software. Introducedfloating sound insulation bulkhead and floating soundproofing floor which was twostructural forms of the floating sound insulation structure, and came to conclusion thatit can reduce noise’s SPL effectively. Analyzed the key points of the principle model,contrasted the difference between60mm polyurethane adding20mm air gap withother sound-absorbing porous materials with one cabin’s side, and drew a conclusionthat this multiple lay-up levels was the best noise control treatment. Formed floatingsound insulation structure base on the forms above on and studied on the target Jack-up drilling platform’s NCTs. At the same time, it was better and effective tocontrol the noise in the source, and the structure borne noise provided more power todistant cabins than airborne noise. Sound-absorbing porous materials could controland reduce the cabin’s noise obviously and effectively.4. The simulation results showed up by curve graph and sound pressure level plotand form, and we could observe the effects of pre-processing and post-processingintuitively. It could achieve the desired purpose essentially in the noise prediction andnoise control treatment of Jack-up drilling platform living quarter cabins. It hadcertain guidance and supplementary role in the view of prediction process theory andnoise control treatments scheme. It had certain value for engineering application inimproving the environment quality of Jack-up drilling platform living area cabins andreducing target platform construction design cost and shortening the production cyclefor the offshore platform.