To verify the damping effect of dual mass flywheel, the experiment is designed in use of power-transmission test-bed and rev-torque testing apparatus, and dual mass flywheel of DCT transmission system DQ250 is used to test its damping effect in the experiment. Kinds of conditions of car, like idle condition, run condition, climb condition, are simulated in experiment. The results show that different engine revs and loads, different damping effects of dual mass flywheel. The high engine rev and the more load, the better damping effect of dual mass flywheel.

Ship navigation performance more and more attention in real sea conditions.To study the properties of ship motion in waves, Applling hydrodynamics calculation software for AQWA-line and AQWA-AGS modules and taking into account the role of random wave load, 2450DWT a small oil tanker in simulation and analysis of a campaign response under sea conditions, Calculate shipping in several waves under the angle of vertical and horizontal swing, heave, pitch, roll and the first rolling response amplitude operators of RAOs, additional parameters such as quality and radiation damping. Application of spectrum analysis method, ITTC wave with two parameters, which strike the spectral density of ship motion, and finally using Excel to calculate sprawling forecast prediction of ship under irregular wave.

Using the finite element ANSYS workbench platform Hydrodynamic Diffraction and Hydrodynamic Time Response Module, taking a self-elevating offshore mooring location as a study case for the corresponding value calculated the dynamic response of the platform. Studied in the wind, waves and currents under load, platforms and mooring ropes coupled motion in case of time-domain response analysis, and get mooring ropes mooring and platform displacement force-time curve. Methods discussed in this paper have a certain reference value for offshore platform mooring positioning.