Abstract
To reduce the transmission of vibration energy from the ship’s pipeline to the bulkhead, a novel all-metal pipe element passing through the bulkhead with symmetrical elastic installation was proposed in this paper. A metal bellow, a multi-layer thin-walled symmetrical structure, was used as an elastic element and entangled metallic wire materials (EMWM) were used as a damping element. The insertion loss was adopted to evaluate the vibration damping performance. The results show that compared with the pipe element passing through the bulkhead with rigid installation, the vibration damping performance of the pipe element passing through bulkhead with symmetrical elastic installation can significantly isolate the vibration transition, and the maximum average insertion loss in each direction can reach 25.4 dB. A thermal-vibration joint test system of the pipe element passing through the bulkhead was built. A series of comparison experiments were carried out to investigate the influence of temperature, symmetrical measure points, and exciting directions on the vibration response transmitted to the bulkhead. Therefore, the vibration damping performance was verified.
Highlights
The pipe element passing through the bulkhead is a thin-walled transmission component that transports high-temperature and high-pressure fluid through the various compartments of a ship
The insertion loss was used as the evaluation method, and the vibration response of the pipe element passing through the bulkhead with symmetrical elastic and rigid installation transmitted to the bulkhead was compared and analyzed
The pipe element passing through the bulkhead with symmetrical elastic installation is mainly composed of multi-layer thin-walled symmetrical metal bellows, conical tubes, an entangled metallic wire materials (EMWM)-filled damping member, connecting rings, end covers, end flanges, etc
Summary
The pipe element passing through the bulkhead is a thin-walled transmission component that transports high-temperature and high-pressure fluid through the various compartments of a ship. The thin-walled structure pipeline can reduce the installation weight, and has good mechanical strength under the premise of ensuring the transportation work [4,5,6,7,8]. The traditional technology of a pipe element passing through a bulkhead is to directly seam weld a thin-walled pipeline and the bulkhead to meet the strength of the bulkhead. Such a rigid connection causes the vibration of the pipeline to be directly transmitted to the ship, which affects the stability and life of the vessel [9]. Researchers have carried out many useful explorations to cut off the vibration energy transmission path of the pipeline
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
