I have a project that I am working on that needs to have the vibration reduced significanlty, target level is nanometer levelThe structure is a triangle shape 30/60/90deg two sides with a mass attached to the back connecting the two sides together (60deg adjacent side) about 3quot; thickThe two sides are also connected together with along the 30deg adjacentMaterial is hollow aluminum in the shape of a squareThe main question are if you have sugestions on damping techniques, materials that have damping properties, or structual enhancements that would reduce vibrations.ConstraintsDistance between an object placed on one side to another object placed in the mass on the back( meaning that two structures can take the place of one if needed) The top must have an open corridor for lightLarge temperature fluctuations
Not enough information to answer the question (and it's hard to visualize what the thing is without a drawing)Some things to consider are 1What frequency range do you want to isolate? 2Are you bothered about no absolute motion (i.elow accelerations) or just no relative motion between two points on the device? As a general principle, it's better to design out any unwanted dynamic response, rather than try to damp it out as an add onDo a vibration analysis to check you don't have any vibration modes that will cause trouble, and mount the equipment to minimize any force inputs from the environmentIf you are trying to get to the nanometer level, you may find the building that it is in already moves more than that when traffic drives past on the nearest road or people walk about inside the building, so bolting your device rigidly to the floor or standing it on a bench is guarateed to failThe easiest way to isolate the whole structure from its environment is make it with a large mass and mount it on very soft springsYou may need to make a floating table - for example a large rigid block of concrete, or a box structure with a rigid top and filled with sand as a cheap way of adding a lot of mass (a tonne or more), sitting on a raft of car or truck tire inner tubes inflated to lift it clear of the groundThat would give you a vibration-free base to mount your device onHope that helps.
