Local spider element targets in universal connections

A Local Spider is a type of target for creating lumped mass or nodal universal connections (kinematic, rigid, bush, damper, or spring). You can use the local spider as a tool to connect the main spider to the target. For example, the lumped mass or nodal connection can connect to the target directly by connecting the main spider to the node, or by creating a local spider on one of the main spider legs.

You can use the Local Spider target to connect one or both targets (Target 1 and Target 2), as in the following examples.

Local spider target 1 (1), main spider center (2), main spider leg / local spider center (3), local spider leg (4), single point target 2 (5)

Local spider target for target 1 (1) and target 2 (2)

To create a Local Spider target, you must define the following:

• The main spider center, which you can select manually, or which you can let the software compute.

• The locations of the main spider legs. For 2D meshes whose holes have free inner edges, the software automatically finds the inner edge nodes and creates the local spider legs for you. Thus, you can select a node on the hole, or a point that is within the search radius that you specify.

• The target that you want the main spider legs to connect to, and the maximum search distance the software can use to detect target.

• How you want the software to connect the main spider legs to the target, such as all of the targets you selected, or just the closest ones.

• If the target is a hole, how you want the nodes of the hole and around the hole to be selected. For example, you can use the ring options to specify whether you want the leg nodes to be created on a single ring, concentric rings, or an expanded radius.Single ringConcentric ringsExpanded radius

Note:

The software displays the legs of the local spider if the local spider has less than 100 legs (that is, the local spider connects to less than 100 nodes). If the local spider has more than 100 legs, the software does not display the individual legs. Instead, the software computes the center of gravity and from that point draws a line and displays the total number of connected nodes.

Where do I find it?

Application	Pre/Post
Prerequisite	A FEM or assembly FEM file as the work part and displayed part
Command Finder	Bushing Connection Damper Connection Kinematic Connection Rigid Connection Spring Connection Lumped Mass

How do I

Realize (mesh) universal connections

Create and edit universal connections

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Universal connections

Managing element-associated data for universal connections (Abaqus)

Bearing universal connection for rotor dynamics (SOL 414)

Using bushing universal connections in rotor dynamics (SOL 414)

Clinch universal connections in the LS-DYNA environment

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Universal connection elements

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Local spider element targets in universal connections, Simcenter 3D 2021.1 Series

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