Let’s start by building out a simple frame, this will be what we’re lifting using the cable elements. We’re going to make the most of the following handy modeling features:

• ペンツール – model quickly using the pen tool
• Multi-edit – hold CTRL and drag the mouse to select and multi-edit parts of your model
• Search Sections – quick add sections from our library in seconds, using search
• 面積荷重 – one way, 自動計算される双方向荷重および風荷重面荷重 (そして再調整してください!) メンバーの支流地域.

So now we add the cables. Cables are non-linear elements, so are basically added the same way you would add any other member. The main difference is that cables are never in compression, have zero flexural, ねじりまたはせん断能力 (they are tension-only) and they often exhibit large displacements and non-linear behavior. So analysing these types of elements is treated slightly different to regular steel elements that have flexural and other strength.

Modeling the cable elements is done the same way you would any other element. しかしながら, when you are assigning the attributes, あなたが選択します タイプ: ケーブル. This will automatically assign the element with pinned end fixities and have it treated as a cable element in the solver.

Opening up the Renderer view, clearly shows the cable elements (in this model, denoted as Section ID 2).

Applying equipment loads to your frame structure is the same as in regular analysis models. In this case we have applied an equipment load (を使用して two-way area loads) and some other dead load (を使用して one-way area loads).

Cables typically undergo large deformations when subjected to significant loads. Geometric nonlinearity accounts for the changes in cable geometry as it deforms. The initial assumption of linearity in the cable’s response (as in linear static analysis) becomes invalid when the deformations become significant.

It is necessary to use a non-linear analysis when cable elements are present, since non-linear analysis considers these geometric changes and provides more accurate results. When you load or tension a cable, after each step the structure has moved so much that the loads are not necessarily being applied in the same position as before.

したがって, for this structure we will need to perform a non-linear analysis. 注意: if user selects 線形静解析, it will automatically revery to non-linear analysis.

Once the analysis is successfully completed, it’s a good idea to check the deflections to (a) ensure the numbers are reasonable and (b) animate the deflection of the structure to see if it deforms in a way you’d expect. If cable elements are not solving correctly, you will see jagged deflection curves and could be an indication that the cables are under or overloaded.

A well behaving cable element should be smooth, sagging and showing tension-only deformations, as seen in the example model:

Another result worth reviewing, is the axial stress in the cable tendons. 明らかに, ケーブルにはせん断や曲げに対する耐力がないため、, すべての力は要素内の張力を介して伝達されます. デフォルトでは、構造は材料降伏/極限強度を超える応力を強調表示します。. 独自のカスタム許容応力を入力することもできます, ストレス限界を超える要素を簡単に特定できるようにする:

If your cable structure is failing to solve (a lot of times due to instability or the inability to converge), here are some common things to check or try:

1. 直径サイズを確認してください
2. ケーブルに過負荷/過負荷がかかっていないことを確認してください
3. 収束精度を下げる
4. 追加のサポートを追加する
5. 他のメンバーを確認してください

• ケーブル要素
• ケーブル解析と線形静的解析の違い
• 5 ケーブルの収束を改善するためのヒント
• 非線形静的解析