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RD-HM-T: 1020 Front Impact Bumper Model
This tutorial demonstrates how to find deformation, stress, and energy absorbing capacity of various structural components of a vehicle hitting a stationary or moving object.

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新機能
Radioss 2025の新機能を確認できます。
概要
Radioss^®は、衝突と衝撃ソリューションのための優れた陽解法有限要素ソルバーです。
Tutorials
Discover Radioss functionality with interactive tutorials.
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    This tutorial demonstrates how to simulate a simple cantilever problem with a concentrated load at the free end, using Dynamic Relaxation (/DYREL) method to obtain a static solution.
  - RD-HM-T: 1020 Front Impact Bumper Model
    This tutorial demonstrates how to find deformation, stress, and energy absorbing capacity of various structural components of a vehicle hitting a stationary or moving object.
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- SimLab Tutorials
  SimLabを使用したVideo tutorials。
ユーザーガイド
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Theory Manual
This manual provides detailed information about the theory used in the Altair Radioss Solver.
User Subroutines
This manual describes the interface between Altair Radioss and user subroutines.

RD-HM-T: 1020 Front Impact Bumper Model

This tutorial demonstrates how to find deformation, stress, and energy absorbing capacity of various structural components of a vehicle hitting a stationary or moving object.

The component is crashworthy (safe), if it meets the plastic strain and energy targets.

A bumper beam is one of the components that is used to protect passengers from front and rear collision.

Bumper beam crash tests are necessary, for instance to calculate the energy absorption of this component during a crash.

図 1.

In this lesson you will learn to:

Step 1: Load the Radioss (Block) interface and load initial solver deck
Step 2: Global de-penetration
Step 3: Define material and failure
Step 4: Define property
Step 5: Define spotwelds
Step 6: Mirroring model
Step 7: Set contact
Step 8: Define rigid body
Step 9: Define boundary condition
Step 10: Define loading (gravity / initial velocity)
Step 11: Create rigid wall
Step 12: Create accelerometer
Step 13: Define section
Step 14: Model check
Step 15: Define output (time history / anim)
Step 16: Create Engine setup and export the model
Step 17: Run the model and check the results

Model Description

UNITS: Length (mm), Time (ms), Mass (kg), Force (kN) and Stress (GPa)
Simulation time: [0 – 100.0]
Boundary Conditions: Gravity load, initial velocity of -5.0 m/s of the bumper beam on the rigid wall
/MAT/LAW2 (PLAS_JOHNS): for bumper parts and crash box parts
/PROP/TYPE1（SHELL）: for bumper beam parts and crash box parts
/INTER/TYPE2: for tied interface that connects a set of secondary nodes to a main surface (connect coarse and fine meshes, model spotwelds, rivets, and so on)
/INTER/TYPE7: Penalty contact between all versus all
/FAIL/BIQUAD: model failure

Prerequisites

To run this simulation, you will need access to a licensed version of Radioss. You will need an internet connection to watch the video tutorials and download the files.

Model Files

開始する前に、このチュートリアルで使用するファイルを作業ディレクトリにコピーします。

Front_Impact_initial_0000.rad

Tutorial Video