2results about How to "Reliable calculation method" patented technology

The invention belongs to the technical field of ballastless track interface mechanics, and particularly discloses an assembly type test device and test method for measuring normal mechanical parameters of an interlayer interface of a ballastless track. The center of the measuring platform is provided with a left side fixing device and a right side fixing device which are used for fixing the pushing test piece, the pushing test piece comprises an upper concrete test piece and a lower concrete test piece, the lower concrete test piece is provided with a reserved fixing hole for fixing the pushing test piece, and the reserved fixing hole is rigidly matched with a positioning screw rod, so that the pushing test piece can be fixed. The self-alignment assembly is realized; a simple and reliable measurement and calculation method is developed in a matched mode and used for obtaining a normal force-displacement relation curve and key normal cohesion parameters of the ballastless track interlayer interface, and a theoretical basis and data support are provided for numerical simulation and damage analysis of ballastless track interlayer interface behaviors.

The application relates to a method for calculating the speed attenuation coefficient of personnel walking in any direction when a ship body is inclined, and provides a method for calculating the speed attenuation coefficient of personnel walking in any direction when a ship body is inclined (heeled or tilted), which is reliable in theory, clear in concept and easy to realize, and can be used for calculating the walking speed of personnel on a ship (especially a passenger ship) in any direction when the ship body is inclined, so as to provide reasonable basic data for calculating the escape and evacuation time of personnel on the ship, reasonably planning the evacuation path and escape exit of personnel on the ship.