With the increasing of speed of elevator, noise has been becomming an important factor of the ride comfort. Mechanical noise and aerodynamic noise are the main types of elevator noise. The research of mechanical noise are mainly focused on vibration characteristics of the structure and the friction which is on elevator cars, counterweight and guide rails as well as wire ropes. The research of aerodynamic noise are mainly included three aspects: the influences of aerodynamic noise resulted in the shape of elevator cars, the research of noise reduction technology on different noise bands and the research of elevator system dynamics model’s optimal design. Based on the analysis of high-speed elevator noise research, we investigate the existing problems and trends on high-speed traction elevator noise.

Effects of high pressure heat treatment on the microstructure refinement and corrosion resistance of brass were studied by means of metallographic observation, SEM/EDX, profilometer and CH1660A electrochemical instrument. Brass were heated from 23°C to 700°C and kept at 700°C for 10 minutes under high pressure of 1GPa, 3GPa, 4GPa and 6GPa, respectively. The results show that high pressure heat treatment has great influence not only on the microstructure refinement of the alloy but also on its corrosion resistance in HCl solution. Under 3GPa, the refined microstructure can be found and the corrosion resistance of the alloy changes into much worse. However, under a higher pressure of 6GPa, the corrosion resistance increases and the microstructure refining effect is not obvious. All the findings of this work were elucidated in terms of the change in the formation and growing of the crystal under a high pressure heat treatment condition.

The composites of expanded ghaphite with ZnO (EG/ZnO) have been prepared in the method of impregnation, and their degradation performance for crude oil have been investigated by the means of UV-Vis and FT-IR. The morphology and crystal structure of the EG/ZnO composites have been characterized by the means of SEM and XRD. The results are shown as follows: the EG/ZnO composites keep the laminated and microporous network structure of EG. ZnO particles in the composites are hexagonal crystal system, and they widely distribute in the cavities and the network pores of EG. In the UV-Vis spectra, there is a blue shift about 13 nm, which is from 255 nm to 242 nm at the biggest absorption peak. That indicates the component of the crude oil has already changed. Meanwhile, the results of FT-IR spectra show that a degradation reaction occurs obviously in the crude oil after irradiated by ultraviolet ray, and the degradation products possibly include alkone, aldehyde, alcohol, and so on. Thus, it can be inferred that the prepared EG/ZnO composites would be a new kind of functional material integrated strong adsorption property and degradation property into itself.

In order to overcome the shortage of dealing with fuzzy information and uncertainty of fault logical relationship in traditional importance measures, the fuzzy set theory is presented to fault tree, using fuzzy number to describe the fault states of system and components, and using fuzzy subsets to denote the fault rates, a fuzzy fault tree of T-S modle was established. And a model of fuzzy fault tree was established and a T-S fuzzy importance analysis method was presented on the basis of T-S analysis method. The method is applied in the importance analysis of hydraulic system, and proving that the algorithms are feasible.

Force behaviors of the loading platform of rotating stereo garages is analyzed, equations describing the load capacity and the deformation limit state are proposed for the key sections by applying the second-order moment into the reliability analysis of the main beam. Considering random parameters subject to normal distribution, a reliability model of the main beam of the loading platform is set up based on multiple failure modes and the reliability is analyzed and calculated by using second-order moment. Simulation results show that the reliability model is significant to guide designing on the reliability of rotating stereo garages and improves rotating stereo garages.