ADAMS动力学分析软件教程9.pptVIP

General Design of Mechanical Engineering LEE, Chul-Hee Department of Mechanical Engineering INHA University Copyright © 2010, Chul-Hee LEE Spring-Component Forces: action-reaction Spline function AKISPL function Non-linear spring project Term project: tire part Term project: road file Structure The single-component force has only one action and reaction effect between two bodies. The characteristic of the force Single-Component Force The Spline shown the relationship between two kinds of data. Empirical data from suppliers or standard tables for: Nonlinear compliances (force versus velocity). Curves for torque versus motor speed (torque versus angular velocity). Data taken from physical prototype simulations for: Accelerometer data (acceleration versus time). Tire lateral force as a function of normal force and slip angle. Spline Function To incorporate data into a simulation First, create a spline from either: Data points entered manually into the Spline Editor. Imported test data from a file. Then, reference the spline through a spline function used in a motion or force. Several interpolation methods are available (using the function type): Cubic-fitting method (CUBSPL) Akima-fitting method (AKISPL) B-spline method (CURVE) Spline Function AKISPL (x, z, spline, iord) x - Independent variable specifying the value along the x-axis. z - Optionally, a second independent variable specifying the value along the z-axis of the surface being interpolated. spline - Spline used to map the one-to-one correspondence of the dependent variables (y) against independent variable values (x or z). iord - An integer variable that specifies the order of the interpolated point (usually 0, but can be 1 or 2). Syntax for AKISPL Function AKISPL Example Investigate the differences between a linear spring and a nonlinear spring using a spline function. Problem Start ADAMS/View from the directory exercise_dir/mod_15_spring. Create a new model named Nonlinear_spring_mass. Bu