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HONGJIN
Application Range:
The simulated three-level highway bump test bench is designed for conducting accelerated simulation tests for products transported by trucks on highways, to determine if the product can withstand the expected transportation vibration environment. The highway transportation accelerated simulation test involves using a simulation platform to increase the test values of transport vibrations, thereby shortening the time for the transport simulation test. It is performed to match the fatigue and cumulative damage statistical characteristics of the automobile transportation environment.
Product Overview:
The simulated three-level highway bump test bench is used to assess the ability of various items with specific loads to withstand real road conditions during highway transportation. The test is conducted in the laboratory to simulate the impact of actual road conditions on the items. This provides a basis for evaluating or confirming the durability of the items and their packaging.
Product Features:
The simulated three-level highway bump test bench reproduces the vibration environment experienced by a vehicle on the road during the testing process. It uses a frequency band approximation method to simulate wideband random vibrations. Each frequency band contains a main natural frequency and meets the power spectrum of the frequency band. The vibration parameters of the transportation table are consistent with the actual road spectrum, and the test bench’s rotation time is equal to the actual time.
Standards Met:
QJ815.2 National Aerospace Industry Ministry Standard – "Product Highway Transportation Accelerated Simulation Test Requirements and Methods"
Simulated Road Conditions:
Level 3 Highway: Medium road surface、Level 4 Highway: Medium road surface、Low-grade road surface
Working Principle:
The simulated vehicle transportation test bench mechanically simulates the vibration environment of a vehicle on the road, reproducing this in the laboratory. The design concept is based on statistics, employing principles of probability theory and random control theory. Since the vertical vibrations of a vehicle are wideband random vibrations, it is difficult to reproduce the power spectrum mechanically. Therefore, the design uses a frequency band approximation method to simulate wideband random vibration, where each frequency band contains a natural frequency (the vehicle's natural frequency), and the power of each frequency band satisfies the following relationship:
δi_table = δi_car
Where:
δi_table is the root mean square (RMS) acceleration of point i on the transport table in the i-th frequency band.
δi_car is the RMS acceleration of point i in the i-th frequency band inside the vehicle.
In terms of vibration levels, the transport table and the actual vehicle are consistent. Regarding time, the transport table and the actual vehicle time are in a 1:1 ratio, meaning the experimental time matches the actual vehicle time.
The vibration on the transport table is wideband random vibration, and the technical indicators are described using parameters that characterize random vibration, which should not be confused with single-frequency sinusoidal vibrations.
Product Parameters:
Actual Product Photos:
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