Advanced Materials Research Vols. 430-432

Abstract: The stiffness of the seat from CRH high speed train was studied. First, FEM analysis was performed on the entire seat and the backrest frame. Results showed that the backrest frame accounts for most of the seat’s deformation. Then a three factors and three levels orthogonal experiment was designed to find which component affects the stiffness of backrest. From the results of nine experiments, conclusion that side beams have the high sensitivity on seat stiffness. Finally, size optimization was carried on to find best cross section of the side beam. The FEM analysis of new design showed that the maximum deformation of the seat was 9.27mm, decreased by 24.1% compared with original design

Abstract: Removed due to plagiarism Original has been published in Min Wei (2011) A Research on Tourism Service Quality: Measurement and Evaluation. Communications in Computer and Information Science, 2011, Volume 215, 298-304, DOI: 10.1007/978-3-642-23324-1_48.

Abstract: In this paper, we had a field test study in mud-pumping of the subgrade. During the experiment, from the process and the parameters, and based on the laboratory tests, a series of tests on the soil at the mud-pumping of the subgrade have been done before and after the improvement of the physical parameters.Studies show that the adopted materials, processes and parameters to be successful.

Abstract: To solve the single tube gathering process paraffin oil viscosity reduction shaft and gathering the problem of high back pressure. Technical application of crude oil pour point depressant, mixed ester, benzene, ethylene oxide such as octylphenol ether compound by an oil-soluble DRA. Dosage in the 50 ~ 100mg/l to meet the water when the wellbore is less than 25% of the wax viscosity and single-tube process requirements gathering, can be compared to the multi-port wells, monitoring data before and after dosing showed that the crude oil after dosing freezing point decreased 5.6 °C, the average rate of 87.4% viscosity reduction, the average rate of 91.5% paraffin. Pipeline wellhead back pressure reduced by 20 to 30 percentage points

Abstract: Through study of abutment force we can find mechanism of arch dam during process of overloading. It does elastic-plastic analysis by FEM, research shows that: arch dam abutment force first increase and then decrease from the top to the bottom of the dam.

Abstract: The A7N01 aluminum alloy was welded by MIG welding in test, and the microstructure and mechanical property of joint were investigated. The results of experimentation show that the feature of the A7N01 aluminum alloy MIG welding joint is perfect with a gentle transition. The microstructure of fusion metal in A7N01 joint is as-cast grain. The microstructure of fusion zone consists of the fine columnar grains. It is rolling structure in the parent metal. In HAZ, the rolling structure is disappearing. The η′ (MgZn2) strengthening phases were precipitated in the grain boundary of the A7N01 aluminum alloy. The size of η′ strengthening phase is about 5-10 nm. There is no precipitation phase in welding metal of A7N01 joint. The fine η′ transitional phases of the primeval parent metal are turned to the coarse η (MgZn2) stable phases of the HAZ. The size of η strengthening phase is about 50 nm. The tensile strength and the percentage elongation after fracture of A7N01 welding joint is below the parent metal.