Abstract: A vibration table includes a base, a plurality of springs, and a platform supported by the springs on the base. The platform includes spaced-apart first and second sides and at least one reinforcing member extending transversely across the second side. The first side of the platform defines a mounting or support surface for mounting articles on the vibration table. The second side includes a plurality of reinforcing members. The platform is vibrated by a plurality of vibration assemblies which are mounted to the reinforcing members whereby the reinforcing member distributes vibration from the vibration assemblies uniformly across the platform. At least one of the reinforcing members includes a mounting surface which extends generally orthogonal to the second side of the platform.

Abstract: A true random vibration generator for use in mechanical vibration generation includes a housing, a piston, and a programmer. The housing defines a cylinder closed at an impact end. The piston is slidably disposed in the cylinder and propelled by a pressurized gas. The programmer is freely moveable in the cylinder between the piston and the impact end of the cylinder. As the piston is propelled towards the impact end of the cylinder by the pressurized gas, the piston strikes the programmer causing the programmer to randomly bounce between the impact end of the cylinder and the piston. The bouncing continue until the programmer impacts the housing and the cylinder at substantially the same time. The piston is then propelled back its original position by the pressurized gas and the impact with the housing. The above described piston cycle is repeated and continues to impart vibration energy to the housing.