Numerical analysis
Effective Width and Plate-to-Plate Restriction Calculations of Profiled Steel Sheeting
Profiled steel sheeting is a form of cold-formed steel and the main building retaining structure.In order to easily calculate the cross-section cold-formed steel properties,von Karman introduced the “effective width” concept in 1932.Abroad,as well as the norms of our country on the profiled steel sheeting in the design calculations are carried out on the basis of [...]
Numerical Analysis of Uplift Bearing Capacity Behavior of Rock-socketed Piles and Belled Piles
With the rapid development of municipal engineering,in order to alleviate the space constraints of urban development,lots of underground structures are built.The study on stability of underground structures resisting the uplift load is being adverted.And tension piles are usually used to resist the uplift load in the engineering practice.Meanwhile,tension piles are also widely employed to restrain [...]
Research of the Attenuation Rule of the Water Shock Wave Effect for Underwater Drilling Blasting
Underwater blasting as an important engineering branch has a complex construction and high technical feature.After the Second World War,with the development of international shipping industry,countries in order to clear the channel to deepen the port construction,underwater blasting have been rapid development.In the process of underwater borehole blasting more of the engineering practice,the former Soviet Union [...]
Research on Some Key Technologies of the Aerostatic Stage
Ultra-precision micro-displacement stage system plays an important role in modern industry and scientific research field. The high precision and high resolution are the important symbols of the development of high-tech level in each country. The further research in key technology of advanced structural materials, porous gas lubrication and direct-drive has been made by the previous [...]
The Application and Rehabilitation Effect Evaluation of Fracture Grouting Technology in Core Dam
The technique of fracture grouting was created by Chinese, which is used to deal with the seepage&deform stability of embankment dam. It has been widely used in china since 1970`s, but its history is so short that many theoretical problems should be solved. Based on a great number of studies performed buy former researchers, the [...]
Investigation on Partial Emission Pump with Super-low Specific Speed
As the rapid development of petrochemical industry and the fertilizer and pharmaceutical industries,more and more pumps with little flow are needed and the partial flow pump is a kind of new centrifugal pump with little flow and high head. Compared with the ordinary centrifugal pump,the structure of the partial flow pump is simple and its [...]
Acoustic Performance Simulation Analysis and Experiment Study for Muffler Air Pipe of 4100QB Diesel
The thesis takes muffler of automobile as research object. According to related acoustic theories, using 3D number method simulating acoustic characteristic of engine’s exhaust noise, and reflection the effect of eliminate noise, to find out the best project.Take 4100 QB engine as an example, base on finite element method, we establishment the 3D models and [...]
Dynamic Analysis Methods of Large-sized Centrifugal Compressor Impeller
Impeller is the most important part of centrifugal compressor.It is not enough for the reliability design of impeller that only the centrifugal load is considered in the static analysis.The flow-solid interaction and the special dynamic behavior must be considered during the impeller analysis process.It is the key issue for the safety and reliability design of [...]
The Numerical Analysis of Electromagnetic Field and Temperature Field in Hydraulic Motor-vane Pump
Traditional hydraulic power unit is low efficiency and high noise and so it limits its use and development at present.A new design which called the hydraulic motor-vane pump (HMP) is put forward.The electric motor and vane pump are combined as a whole unit which don’t need coupler.The vane pump is skillfully integrated into the rotor [...]
Analysis for the Effect on the Earth Dam Due to the Water Level Change Abruptly
As it is getting warmer in the whole world, wet and dry seasons often happen, which always last for a long time. Due to the water level changes abruptly in the river or reservoir caused by the flood, a large water head is created. The seepage in the soil becomes unstable, inducing the seepage breakage [...]