Li Zhen Zhang

The Design of Oscillating Hydrofoil Current Generation Device

The oscillating hydrofoil current generation device utilizes a typical movement type, which can transform energy effectively from current. The study shows that the geometrical profile of blades is the fundamental factor to the efficiency. In order to resolve the problem, this paper adapt the BEM(blade elements momentum) theory, which plays an important role in resolving the turbine blade design. Use the MATLAB to calculate of the constraint equations, then translate the coordinates which has got through the calculation to Solidworks which is a convenient 3D modeling soft. In the end we will give an example which has modeled 3-D hydrofoil BEM theory.

Vibration Analysis of Transmission System on the Small Aquatic Harvesting Machine

With the rapid development of industry, the status of the eutrophication of water is becoming more and more serious. The result is that water blooms and the environment becomes worse. In order to resolve this question ,ShangHai Ocean University designed a small aquatic harvester. According to the vibration problem on the research of the transmission system of the small aquatic harvester , the text has given suggestions on how to reduce the vibration problems after taking theoretical analys from the angle of assembly error.

Impaction of Travel Behavior and Degree of Business District Prosperity on Shopping

Three Media-Markets located in Shanghai have been studied the research in this area to quantitatively analysis how transportation factors such as travel time, transportation method, distance, cost and the degree of business districts prosperity affect store choice behavior.

Modular Design of Small Marine Aquatic Cutting Machine

With the rise of mass customization production, the advantages of modular design are highlighted. Through the selection and combination of modules, different products can be made. It can help to meet the various market demands for the product design. The modular design concept in the small aquatic cutting machine, can enhance product innovation, shorten the design cycle and improve the degree of customization.

Feasibility Analysis on Oscillating Buoy Wave Power Device for Ocean Buoy

When the oscillating buoy wave power device installed on the ocean buoy, the floater and the ocean buoy move up and down under the action of the waves. Therefore, whether there is a vertical relative displacement between the floater and the ocean buoy becomes a crucial problem of the wave power generation. Based on the wave theory, taking the vertical cylinder floater for example, introduced the wave force and the moving displacement of the floater，the relative displacement between the floater and three different sizes of ocean buoys under four different oceanic conditions was analyzed by MATLAB. The result indicates that the greater wave height, the greater relative displacement; the shorter wave period, the greater relative displacement; and the larger size of the ocean buoy, the greater relative displacement. So the electric power can be generated and the scheme is feasible.

Measuring Free-Flow Speed Considering Water Depth

In this paper, we propose a method of measuring free flow speed according to different water depth in the ponding situation. With different water depth, changes of tire-road friction coefficient caused by reduction of the wheel load are different. This coefficient brings great effect to vehicles free flow speed. In order to reveal this phenomena, observations data obtained in the year 2009 at the number 202 state road in Japan, which runs through Fukuoka, Itosima. By measuring the recording data, we got the speed range corresponding to different water depth. The purpose of this study is to obtain variation of free flow speed according to different water depth and lay foundations for numerical modeling in the future.

Development of a Small Aquatic Cutting Machine

To solve the aquatic cutting problems in small waters, an aquatic cutting device which can be installed on existing small vessels was developed. The device is simple and practical. Its cutting depth is adjustable and it can be quickly disassembled or installed. After analysis of forces on foundation and simulation in software ADAMS, it shows that the device meets the design requirements.

Research on Fixturing Method of Marine Crankshaft Finish Machining

For marine engine, the quality of the crankshaft is a decisive factor for its mechanical life. In the manufacturing processes of semi-built-up marine crankshaft, as the final process, finish machining of the entirety is vital to the machining accuracy. Applying finite element method, the traditional way for fixturing is analyzed and the problem of machining deformation because of poor rigid and great weight is pointed out. In addition, a new fixturing method is put forward according the structure characters of crankshaft, which provides a technical support for practical machining and theoretical principle of fixturing method for extreme manufacturing. Moreover, a further research direction to increase the fixturing and adjustment efficiency is proposed.

Design of the Shape of Blade of the Semi-Submersible Ocean Current Power Generation Device Based on Fluent

The semi-submersible ocean current power generation device is a new power generation device which can absorb the energy of marine currents. The shape of blade determines the absorbing efficiency which is one of the core technologies. To get force status of the different shape of the blade under the currents by using Fluent software simulate these blades. Then analyze the impacts of the blade shape on the power generation efficiency, the simulation results provide guidance for the design of the actual blades.

Predicting Pedestrian Conflict Avoidance Behavior during School Commute Time

In this research, we adopt pedestrian’s avoidance behavior as the primary indicator of degree of danger and also use discrete choice models to predict this. Through this model, we quantitatively evaluate the dangerous in school road, develop a good understanding of microscopic mechanisms of road traffic, and finally evaluate the possible effects of traffic improvement measures through quantitative measures.