چكيده به لاتين
In this research, the purpose is to find the optimal stiffness coefficients for the engine mounts in order to reduce the displacement of the engine mounts in the three directions x, y and z. For this purpose, first by presenting two examples from the reference dissertation, modeling validation in Adams software is performed by presenting the results of natural system frequencies. With the help of this software, virtual testing can be used instead of physical tests, and as a result, design time and cost can be decreased while creating real conditions. Then, the EF7-TC engine mounts were modeled and simulated in Adams software, and the results of natural frequencies, as well as system displacement and velocity diagrams in the x, y, and z directions, were presented.
After modeling and simulation, the stiffness coefficients of the engine mounts were optimized using Adams and MATLAB software to reduce system displacements. In this study, the limits of stiffness coefficients and natural frequencies are also considered and it is observed that the natural frequencies of the system after optimization are completely within the allowable range.
The results show that at the end of the optimization, the amount of system movements in the three longitudinal directions (x, y and z), and the three rotational directions (θ_x,θ_y,θ_z ) decreased by 31.4%.
