force create element_like bushing

2. A bushing has the same constitutive relation forms as a field. The primary difference between the two forces is that certain coefficients (Kij and Cij, where i is not equal to j) are zero for the bushing. You define only the diagonal coefficients (Kii and Cii) when you write the bushing. The following constitutive equations define how Adams uses the data you input for a bushing to apply a force and a torque to the I marker depending on the displacement and velocity of the I marker relative to the J marker. Adams applies a force of equal magnitude and opposite direction to the J marker.

3. Fx, Fy, and Fz are the measure numbers of the translational force components parallel to the axes of the Cartesian coordinate system of the J marker. The terms x, y, and z are the translational displacements of the I marker with respect to the J marker measured in the Cartesian coordinate system of the J marker. The terms Vx, Vy, and Vz are the time derivatives of x, y, and z, respectively. The terms F1, F1, and F3 represent the measure numbers of any constant force components parallel to the axes of the Cartesian coordinate system of the J marker. Tx, Ty, and Tz are the rotational force components parallel to the axes of the Cartesian coordinate system of the J marker. The terms a, b, and c are the rotational displacements of the I marker about the x-axis, the y-axis, and the zaxis, respectively, of the J marker. The terms Wx, Wy, and Wz are the time derivatives of a, b, and c, respectively, in the J marker reference frame. The terms T1, T2, and T3 are the measure numbers of any constant torque components acting parallel to the axes of the Cartesian coordinate system of the J marker.

4. For the rotational constitutive equations (K1, K2, and K3) to be accurate, at least two of the rotations (a, b, c) must be small. Therefore, the bushing force calculations may not be accurate unless two of the three values remain small (i.e. smaller than 10 degrees). It does not matter which rotation is largest.

5. Normally, entity names are composed of alphabetic, numeric, or '_' (underscore) characters, and start with an alphabetic or '_' character. They may be of any length. For more information, see Using Extended Names. By enclosing the name in double quotes, you may use other printable characters, or start the name with a numeral. If a name contains characters, or starts with a numeral, you must always quote the name when entering it. Note that you can specify the parentage of an entity (e.g. what part "owns" a marker or a geometry element) when you CREATE it by changing the name. If you enter just the entity name, then the default parent will be assigned by Adams View. If you type in the full name, then you may override the default parent. In most cases, when creating an entity, Adams View will provide a default name. The default name that Adams View provides will specify the parentage that it has assumed. You may, of course, delete this name and use your own. The form of a full name is:

6. When you use the FILE Adams_DATA_SET WRITE command, Adams View writes an Adams data file for your model. Adams requires that each modeling element be identified by a unique integer identifier. If you use this parameter to specify a non-zero identifier, Adams View will use it in the corresponding statement in the Adams data file. You may also enter zero as an identifier, either explicitly or by default. The next time you write an Adams file, Adams View will replace the zero with a unique, internally generated identifier. Adams View will permanently store this identifier with the element just as if you had entered it yourself. Normally, you would let all identifiers default to zero, and Adams View would generate the identifiers for you. You are never required to enter a non-zero identifier. You only need to specify it if, for some reason, you wish to control the Adams file output.

7. When an Adams Solver data file (.adm) is read into Adams View, all comments associated with a statement (from the end of the previous statement through the end of the current statement) are stored with the object. Comments in the data file can be associated with model. These comments must follow the title statement and be followed by the comment 'END OF MODEL COMMENTS'. This string must be uppercase. When an Adams Solver data file is written, the comments for an object are written before the statement corresponding to the object.

8. The three damping coefficients multiply the translational velocity components of the I marker along the x-axis, the y-axis, and the z-axis of the J marker. The force due to damping is zero when there is no relative translational velocity between the two markers. DAMPING must be in units of force per unit of displacement per unit of time.

9. The three stiffness coefficients multiply the three translational displacement components of the origin of the I marker along the x-axis, the y-axis, and the z-axis of the J marker. STIFFNESS must be in units of force per unit of displacement.

10.  The force pre-load terms are the constant force components along the x-axis, the y-axis, and the z-axis of the J marker.

11.   The three tdamping coefficients multiply the rotational velocity components of the body in which the I marker is fixed about the x-axis, the y-axis, and the z-axis of the J marker. The torque due to damping is zero when there is no relative rotational velocity between the two markers.

12.   The I and J markers defined by the location parameter will be automatically created at this location on the I_PART_NAME and J_PART_NAME respectively. By default, you supply Cartesian (x, y, z) coordinates. You may use the 'defaults units coordinate_system_type =' command to change this convention. For example, selecting 'cylindrical' means you will subsequently be supplying r, theta, and z coordinates. Adams View applies your location coordinates in the coordinate system you identify with the RELATIVE_TO parameter. The default for the RELATIVE_TO parameter is the default coordinate system. (See the RELATIVE_TO parameter for this command).

13.  The I marker is oriented based on the J marker orientation and the requirements of the particular force being created. These markers are created automatically.

14.   For the ‘along_axis_parameter’, you may enter either one or two locations to direct the axis. If you enter one location, the axis will point toward the location. If you specify two locations, the axis will be parallel to, and pointing the same way as the vector from the first location to the second. Note that this does not completely dictate the orientation of the coordinate system. Adams View will position the coordinate system with an arbitrary rotation about the axis. If you must completely control the coordinate system orientation, use ORIENTATION or IN_PLANE_ORIENTATION. By default, you direct the Z axis of the coordinate system.

15.  You may enter either two or three locations for the ‘referencein_plane_orientation’ parameter. If you enter two locations, the axis will point toward the first location and the plane will fall on the second. If you specify three locations, the axis will be parallel to, and pointing the same way as, the vector from the first location to the second and the plane will be parallel to the plane defined by the three locations. By default, you direct the Z axis of the coordinate system and locate the ZX plane. You may use the 'DEFAULTS ORIENT_AXIS_AND_PLANE AXIS_AND_PLANE_SETTING=' command to change this convention. For example, selecting X_AXIS_XY_PLANE means you will subsequently be directing the X axis and locating the XY plane. Adams View applies your location coordinates in the coordinate system you identify with the RELATIVE_TO parameter. The default for the RELATIVE_TO parameter is the default coordinate system.

16.   If this parameter is not specified, the default coordinate system is used. The default coordinate system is initially your model, i.e. the global coordinate system. You may change the default coordinate system using the 'defaults coordinate_system' command.