A Comparison of Random Vibration 测试 Methods

随机振动试验, sine-on-random testing and narrow band random on random testing all have their own strengths and benefits in regards to revealing design weaknesses of a product that might otherwise only be revealed later during transport or deployment and use.

By simulating the real world environment that a product may encounter during its life cycle, a comprehensive 振动测试ing program can provide you with detailed accuracy on how robustly you need to engineer your product in order to avoid failures in service. This reduces the costly risk of product recall and enables you to achieve your product qualification milestones.

为了执行 振动测试 on a product’s future specific operating environment, it is important to not only understand the environment it will be required to perform in, but also how the different approaches to 振动测试ing might best simulate it.

随机振动试验

随机振动试验 applies vibration energy at all frequencies over a specified frequency range.  Random vibration is the most common type of validation and qualification test.  The majority of mounted devices, including mechanical and electronic devices, will usually experience random vibration conditions in their operating environments.

Sine-on-random 振动测试ing

Sine-on-random (SOR) 振动测试ing applies a single or multiple sine frequencies on a random profile.  在扫频正弦测试中, a vibration sine tone is swept up and down through a range of frequencies at a specific rate and duration upon a random profile.

Sine-on-random 振动测试ing is particularly useful when the product’s application environment includes rotating or reciprocating equipment like turbines, 引擎, 马达及螺旋桨. When used early in the design process, sine-on-random 振动测试ing can be a powerful tool to help reduce the probability of fatigue failure.

Narrow band random-on-random testing

Narrow band random-on-random (ROR) 振动测试ing simulates real-world complex vibration environments with a combination of a broadband random signal and one or more superimposed random narrow bands. Both signal types are usually present simultaneously and the narrow bands can appear at fixed frequencies or be swept over a predefined range.

Narrow band random-on-random testing is particularly applicable for product qualification and fatigue tests. A typical example is the repetitive stress on a vehicle’s headlights, as the vehicle changes speed while travelling on rough terrain. ROR is often the most appropriate type of 振动测试ing for caterpillar-tracked vehicles, 比如推土机和坦克, machines with rotating components, such as propeller-driven aircraft that do not operate at fixed frequencies.

从一开始就降低风险

By working with a testing company who has an expert understanding of the environment in which you are looking to operate, you can reduce the risk of product failure early on in the design stage. We can achieve this in many ways, including computer simulation (有限元分析) during the design phase, engagement with im体育APP’s Early Stage Qualification (ESQ®) team to ensure that the optimum 振动测试ing conditions are selected.  Commercial, Military and 航空航天 standards we commonly test to include RTCA做- 160, 810年为基础, Def Stan 00-35, Bs en 60068 and can take care of your complete testing process to meet unique, 定制, or complex project requirements.

To learn more about the different types of 振动测试ing suitable for your product including combinations of temperature, humidity and altitude extremes and unique corrosive, explosive or harmful environments, 请 im体育APP or call UK +44 808 234 1667 or US +1 888 786 7555.