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In this benchmark example, a semi-elliptical crack at the inner surface of a cylinder is studied. The inside of the cylinder and the crack faces are subjected to a pressure load. The J-integral is calculated along the crack front, and the stress intensity factor is then compared with the ... 詳細を見る

This model showcases how to solve for the scattered field when knowing the incident field for three different types of scatterer, i.e. an infinitely rigid one, a cavity and an elastic inclusion. This formulation can be useful when the scatterer is in the far-field of the source, such ... 詳細を見る

これらの例は, ランダム化された幾何学的サーフェスを生成する方法を示しています. 平面サーフェスのランダムサーフェス機能をカバーするアドインも用意されていることに注意してください. COMSOL Multiphysics® ソフトウェアは, 一様分布やガウス分布のランダム分布, 非常に便利な和演算子など, 強力な組み込み関数と演算子を提供しています. これらのファイルに関連するブログ記事 "COMSOL Multiphysics でランダムサーフェスを生成する方法" では, 表面の粗さの性質を決定する構成空間周波数成分を詳細に制御しながら, 実質的に "ワンライナー" ... 詳細を見る

This example shows how to model prestressed bolts. The bolt geometry is taken from the Part Libraries. For comparison, one of the bolts is modeled using a thread contact formulation, whereas the other bolt is connected to the bolt hole by a pure continuity condition. The reduced ... 詳細を見る

膜, 板, 固体などの構造物と結合した液体または気体の音響は, 多くの工学分野において重要な応用分野です. このモデルは, 固体物体と結合した3次元の音響流体現象を一般的に実証するものです. 固体物体の壁は音圧の影響を受けます. 固体からの周波数応答が計算され, 音響領域にフィードバックされることで波形を解析できます. したがって, このモデルは散乱問題の好例となります. 詳細を見る

This model shows how to use the scattered field formulation to compute the transmission coefficient for impinging P and S plane elastic waves onto a finite size phononic crystal. The transmission tends to zero in the frequency range corresponding to P- and S-wave band gaps, as ... 詳細を見る

Sensitivity analysis is an efficient way of computing the gradient of an objective function with respect to many control variables. This example uses the pitch and yaw in the top of a truss tower as objective functions. It shows how to compute the sensitivity of these angles with respect ... 詳細を見る

Using a Fluid-Solid Interaction multiphysics interface, the behavior of a spring-loaded ball check valve is studied under varying functional and reverse flow. The fluid force acting on the ball opens the valve at the opening pressure. In the case of a reversed pressure, the ball comes ... 詳細を見る

In this tutorial model, the flow in a pipe with a bend is computed using the Pipe Flow interface. The computed fluid load is used as input to a stress analysis in the Pipe Mechanics interface. Gravity loads from the pipe and fluid are also taken into account. 詳細を見る

In his example, the lowest natural frequency of a 3D bracket are maximized using shape optimization. 詳細を見る