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The vehicle bogies of Shanghai metro line 1 began to crack just in the third year after the trains operated. More than 50 cracks occurred in the succeeding six year during the train operation. This paper evaluated the safety of the motorized bogies. First, the loading conditions imposed on the vehicle structure were calculated based on the measured data in service of the train, and compared with the original design load. Then, this paper calculated simulated the stress of the vehicle bogie by 3D FEM, and presented the distribution of every stress concentration point in Goodman fatigue diagram. The computational locations of the strength less than the safety are agreed with where cracks have happened. Finally, this paper calculated the fatigue life of the motor bracket of the bogie through S-N curve based on revised Miner theory. In conclusion, this paper think that the bogie cracks of Shanghai metro line 1 are contributed by the overburden fatigue load, and ignoring the lateral vibration load in the design of the vehicle bogie is the important cause that bogie cracks occurred far earlier than in the designed time. [ABSTRACT FROM AUTHOR]

Progress in the development of underwater sound projectors over the past thirty years in China is presented in this paper. This progress may be divided into four parts:(I) The development of new underwater sound projectors based on new transducer materials such as rare earth giant magnetostrictive materials, relaxation ferroelectric materials and piezoelectric composite materials; (II) The design of new structures and energy transfer mechanisms such as flex-tensional transducers, mosaic cylindrical transducers, longitudinal transducers, flexural disk and beam transducers; (III) The development of new configurations that broaden transducer bandwidth such as free-flooded ring transducers, broadband free-flooded flex-tensional transducers, doubly-excited longitudinal transducers, hybrid longitudinal transducers and matching layer technology; (IV) The development of new transducer design and analysis tools such as finite-element models for complex geometries, structure and fluid coupling mechanisms. These models have been used to optimize the design of a variety of projectors including low-frequency transducers, high power transducers and broadband wide-beam transducers. [ABSTRACT FROM AUTHOR]

For this project, it is focused on design and analysis a new material to do improvement for a portable blender equipment. In Malaysia, there are many industries portable blender that always produce a new design to attract customers around the world. It also gets highly demand especially from China. The material selection and design improvement are important to produce a friendly use of portable blender to convenience users. The Portable Blender industry share involves the current market status with some changing trends that can affect the Portable Blender market growth rate. The objectives of this project are to design a new concept based on selecting material and to decrease the time to run the portable blender. The design of portable blender equipment is using CAD software and then transfer to Finite Element Analysis (FEA) to analyses the capabilities of part design. At the end of this project, this research will give understanding about design using CAD software and do analysis that improved the portable blender equipment. [ABSTRACT FROM AUTHOR]