Mechanical noise caused by power equipment vibration is the main source of underwater radiated noise of the ship, and vibration isolation and noise reduction of ship equipment has been widely concerned. Therefore,a vibration isolation system designed for four sets of auxiliary engine of ship cabin was investigated in the paper, aimed to further reveal the influence of various parameters including floating raft shell thickness, excitation source, and different ship hull and installation platform thickness on the vibration level difference of system. The results obtained from numerical analysis using MSC software and experiment indicate that one-dimensional spring element simplified can properly simulate the actual rubber vibration isolator on low frequency bands, and increasing thickness of flat, hull and platform can improve the effect of vibration isolation obviously.
This paper firstly illustrates the concept and connotation of green and low-carbon highway passenger stations. Based on the analysis of foreign current situation, come up with the principle of how to build an evaluation index system for green and low-carbon highway passenger station. Finally around four links including planning, construction, operation and management, build the evaluation index system and give the content of each indicator.
Around the goal of building a low-carbon logistics park, three aspects about layout optimization related issues which are functional area layout, warehouse layout and road layout are mainly studied in this paper. Functional areas dividing and layout methodology of a low-carbon logistics park are proposed in this paper. Summarizes common methods and main considerations of warehouse layout on the basis of warehouse operation process. Finally proposes methods of road network layout and optimizations of the layout according to the division of different levels of road network in logistics park.
This paper firstly analyzed the current situation of integrated passenger transportation hub, putting forward the integrated passenger transportation hub had a strong advantage on developing green low-carbon economy. And then based on the energy consumption analysis of integrated passenger transportation hub, energy saving and emission reduction management measures were proposed.
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