Measures Against Vibration and Shock

--- About vibration during transportation ---

 

Though there is no precise definition to describe the high frequency rate for vibration,

it is said that the rate is higher than 20Hz (1Hz =1vibration/1sec), and the high frequency can’t be prevented by the truck’s air suspension system.

--- Comparison Experiment of Vibration and Shock: Sylomer VS Other Materials ---

 

 

Comparing Anti-vibration materials of ether-base polyurethane form (Sylomer) vs other cushioning materials : polyethylene foam, anti-vibration rubber and Styrofoam. 



--- Shocking scene caused by vibration during transportation--- 

The products are damaged by vibration and shock in various occasions during the transportation as shown on the slides on the right side. 

 

On the collapse or unevenness of road surfaces during truck transportation

Shock on products at loading time

The switching and the connecting parts of railroad during cargo transportation

At the time of departing, landing, and loading during air transportation 

Cargo handling by forklift at the container yard

Cargo handling by forklift at the packaging 



--- Cases of Corruption by Vibration and Shock During Transportation ---

 

 

 The products shown on the left slides show the corruption caused by vibration and shock during the transportation.

 

Damage on precision instrument parts

Cracked pipe

Crack on details of the products

Prints peeled off

Disconnected connector

Damage on green goods 

Crushed cake



--- Vibration on the Loading Platform of Trucks  ---

 

The Unpreventable Vibration Even by Air Suspension of Trucks 

 

The loading platform of a truck is subject to vibration as it travels over the frame of the truck with the engine always rotating during transport.The suspension of the chassis may prevent vibration and impacts passing through the road, but it does not prevent vibrations and impacts transmitted by high frequencies through the engine to the loading platform.

 



---  Anti-Vibration Pallets  ---

 

Features in Steel Anti-Vibration Pallets 

 

Enabling to provide better vibration control than truck air-suspension 

Using superb materials in anti-vibration and durable ether-based polyurethane foam

Selecting appropriate materials according the products’ weight to keep the stable effectiveness 

Able to make custom sizes for fitting products in various sizes

Superior in durability

 

 Features in Wood Anti-Vibration Pallets

 

Enabling to provide better vibration control than truck air-suspension 

Using excellent vibration control material and ether-polyurethane foam superb in durability  

Choose the right cushion materials based on the weight of the product to maintain a stable effect.

Able to make custom-made sizes for products of different sizes

The low fare makes it suitable for one way transport.


The Anti-vibration pallet is a product jointly developed by Nabeya co., LTD and Musashi Trade Transport Co., Ltd.

 

Feature of Ether-based Polyurethane Foam Anti-Vibration Material 

 

Corresponds to the attenuation and shock absorption of continuous vibration

Attenuates at low frequency vibration

Enable to minimize creep deformation(deformation with age)

More than 20 types of materials that can withstand high-stress and vibration

Over 30 years of experience and solid reliability 

Excellent durability and longevity 


---  Air-Suspension Car vs Anti-Vibration Palette Comparison  ---

 

Performance Verification in Anti-Vibration Palette

 

An actual vehicle running test of a car equipped with Anti-Vibration palette was conducted.

In the actual vehicle running test with Anti-vibration, it was verified that it reduced 21HZ high- frequency vibration compared to air-suspension vehicle.

Enable to suppress vibration and shock superior to air-suspension vehicle.

Please refer to the result of the actual running test shown below.

 

 

---  Comparison in High-Frequency Rate : Air-Suspension vehicle vs Anti-Vibration Vehicle  ---

 

The loaded platform of air suspension heavy-duty vehicle

 

Speed km/h 90km/h 80km/h   70km/h
Engine RPM 1410  1280  1110
Frequency 24Hz 21Hz 18Hz

 Attenuation is about 91.4% (below 1/10)

Case with Anti-Vibration palette

 

 Frequency 2.4Hz 2.1Hz 1.8Hz

--- Actual Vehicle Running Test ---

Below is the joint verification test with Nabeya co.,Ltd and Musashi Trading Co., Ltd

To confirm the effectiveness of Anti-Vibration palette, we ran a truck equipped with Anti-Vibration palette (pad type) equipped with dummy weights and obtained the vibration level data of the upper and lower pallets.

Sample

Palette:1100x1100mm (made of steel)

Anti-Vibration pad type (GSM100 t500mm pad)

Weight:300kg

 

Transportation

Transportation truck: air-suspension vehicle

Transportation distance:226km

 

Measure

Contents: Obtained the vibration level data of the upper and lower pallets while driving a truck

Measuring device: 3-axis acceleration logger x 2 (Able to perform frequency analysis)

Logger installation position : equipped one each on the upper Anti-Vibration plate and lower parts of Anti-Vibration palette itself.

Range of measurement: ±6G

Sensitivity: 200mV/G

 

Analyzing parameter

Window function: Hanning

Number of lines: 2048

Averaging: Addition average

Sampling: 1000Hz


 

 

 

Analysis result of vibration frequency while driving in high-speed

 

Data of upper anti-vibration plate is in blue graph

Data of lower non-anti-vibration palette is in green graph



--- Transport Test by Anti-Vibration Palette  ---

Below is the joint verification test with Nabeya co.,Ltd 

 

Shock-Resistance Test by Lifting Anti-Vibration Palette

 

 

Impact Value G

Without buffer material13.5G

With  Ether-based Polyurethane3.0G



 

  

Drop and impact test

 

Impact Value G

Without buffer material10.1G

With  Ether-based Polyurethane0.8G

 

 



 

 

Angle of Impact Test with Anti-Vibration Palette

 

Impact Value G

Without buffer material 15.4G

With  Ether-based Polyurethane4.2G

 

 

 

 



 

  

Cantilever Drop Test with Anti-Vibration Palette

 

Impact Value G

Without buffer material18.4G

With  Ether-based Polyurethane2.1G

 

 

 



 

 

Pallet Jack Traveling with Anti-Vibration Palette

 

Impact Value G

Without buffer material11.4G

With  Ether-based Polyurethane0.8G

 

 



 

 

Forklift Driving Test with Anti-Vibration Palette

 

Impact Value G

Without buffer material5.4G

With  Ether-based Polyurethane0.8G

 

 



 

 

 

 

Shocking Results and Data Sheet of the Vibration & Shock Test Above

  

 



---  Anti-vibration Floor  ---

 

  

Floor Slab Anti-Vibration of the Same Specification As the Palette

 

Covers the loading platform of trucks and demonstrate high-perform Anti-Vibration effect 

Covers JR containers’ floor and enable to control vibration while traveling


---  JR Container Vibration Transport Test  ---

Today, the environmental problems such as CO2emissions due to global warming is drawing more attention in shifting to train transportation usage, however, the vibration during the cargo transportation makes the modal shift difficult for the products sensitive to vibration such as precision machines, therefore we have developed Anti-vibration floor to enhance the modal shift of JR container Anti-vibration transportation.

 

 

Conducting a comparison test in transportation with Anti-vibration palettes, floor slab Anti-Vibration, and regular palettes.

 

Round trip from Atsugi city in Kanagawa to Shimonoseki port in Yamaguchi


---  Patent-pending! Presenting the most effective approach for Anti-vibration transportation  ---

 

We have applied for a patent on the technology of easily exchanging cushioning materials to achieve

the most appropriate Anti-Palette effect depending on the weight of the product. 

 

Design of Cushioning Materials: Nabeya co., LTD

Design of Distribution Container : Musashi Trade Transport Co., Ltd.

 

 

Patent Application Number: Application2020-080730