Post-Collision Vehicle Door Opening Force Simulation
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Solution Overview
Problem
Traditional physical tests for post-collision opening force of vehicle front doors are time-consuming and costly, providing feedback only after vehicle components are fully formed, and they cannot effectively target specific components for modification to ensure safety.
Innovation Solution
A simulation method predicting post-collision opening force by simulating deformations of vehicle components and using imaginary springs to calculate door opening forces, with iterative modifications to design components like the NHV insulation plate and fender mount to meet safety requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical tests are conducted to measure post-collision opening force, then accurate measurement of opening force is achieved, but the testing process is time-consuming and costly
Solution Approach 1:
The patent creates a virtual copy of the vehicle door system through finite element modeling. The simulation model replicates the physical door, fender, and surrounding structures, allowing virtual collision and door opening simulations that mirror physical tests without requiring actual hardware testing, thereby eliminating time and cost while maintaining measurement accuracy
Solution Approach 2:
The patent replaces the physical mechanical testing system with a computational simulation system. Instead of using physical actuators to apply force to a real door and measure opening force with sensors, the system uses numerical algorithms to calculate forces and deformations, substituting mechanical measurement with computational analysis
2Stability of the object's composition
If physical tests are conducted after vehicle components are fully formed, then complete vehicle structure is tested, but feedback is provided too late for design modifications
Solution Approach 1:
The patent enables preliminary simulation and evaluation of door opening force before finalizing the vehicle design. By performing virtual tests during the design phase rather than after manufacturing, engineers can identify and correct issues early, allowing multiple design iterations without the time penalty of repeated physical prototyping and testing
3Reliability
If physical tests are conducted on complete vehicles, then overall vehicle performance is evaluated, but specific target components cannot be isolated for modification
Solution Approach 1:
The patent segments the vehicle system into discrete components (door, fender, mounting flaps, NHV insulation plate) that can be independently modeled and analyzed. This segmentation allows engineers to isolate specific components for modification while maintaining their interactions within the simulation, enabling targeted design changes without testing the entire vehicle
Data Source
AI summary
A simulation method related with the opening force of a front vehicle door after a vehicle frontal collision including: a first simulation step in which deformations of vehicle components which are caused in the vehicle frontal collision to affect the opening of the front door are calculated by simulation; and a second simulation step in which the opening force of the front door after the vehicle frontal collision is predicted by simulation; wherein the components which affect the opening of the front door include a design component and an interface component, the deformations of the design component and the interface component obtained in the first simulation step being used as initial geometric conditions of the design component and the interface component in the second simulation step.