Optimal Design of Machinery Shallow （机械优化设计浅）.pdf

Invited paper International Journal of Mechanical Engineering ( IJME ) Volume 4 Issue 3 (March 2014) ISSN : 2277-7059 / Optimal Design of Machinery Shallow Foundations with Silt Soils Galal A. Hassaan Emeritus Professor, Department of Mechanical Design Production, Faculty of Engineering, Cairo University, Giza, EGYPT galalhassaan@ Abstract Optimal design of shallow foundations used in supporting various machinery is of vital importance. Badly designed foundations result in serious problems such as soil failure, large soil settlement, low vibration efficiency and resonance of structures near by the foundation. An optimal design approach based on using MATLAB optimization tool box is used to provide the optimal design of a machinery foundation on a silty soil. To minimize the foundation cost the foundation mass is used as an objective function. To control the high technical quality of the foundation from soil mechanics and vibrations point of view, 10 functional constraints are used. The soil isolation efficiency of the soil is responsible about the vibration transmitted to the surrounding. Therefore, the effect of the minimum isolation efficiency in the range of 71 – 81 % on the foundation optimal design is investigated in details. The