 Saddle span shelter and joining system |
| Referring to FIGS. 1 and 4, a preferred embodiment of, the saddle span shelter consists of a frame ... |
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| Muntin assembly and method of installing |
| The present invention is best summarized as a muntin bar assembly in which muntin bar molded anchor ... |
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| Universal intercept clip |
| An object of the present invention, therefore, is to advance the state of the window art, and in ... |
|
| Adjustable hub assembly for window muntins |
| The present invention solves these and other deficiencies and problems in the art by providing an ... |
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| Multi-sheet glazing unit having a single spacer frame and method of making same |
| This invention relates to a sheet retaining member having a sheet engaging member having a vertical ... |
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| Method of fabricating muntin bars for simulated divided lite windows |
| In view of the foregoing, it is an objective of the present invention to provide a method for ... |
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| Device for emitting mechanical waves |
| What is claimed is: 1. In a device for emitting mechanical waves comprising a pneumatic chamber for ... |
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| Composite pen tip |
| Therefore, the primary purpose of the present invention is to provide a composite pen tip adapted ... |
|
| Method for blow molding of thermoplastic articles |
| What is claimed is: 1. In a method comprising the step of introducing pressurized air interiorly of ... |
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| Supports of boom end sheaves or similar for a lifting and/or handling machine |
| I claim: 1. A support for boom end sheaves for lifting and/or handling machines comprising a boom ... |
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Static induction apparatus
| Details |
Inventors: Kanoi, Minoru; Hori, Yasuro;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Kozma; Thomas J.
Assistant Examiner:
Attorney, Agent or Firm: Antonelli, Terry and Wands
This invention relates to an isolator for a large-sized static induction apparatus such as transformer and reactor. The static induction apparatus wherein a sound insulation panel is mounted through an elastic body on a reinforcing channel which is disposed on a side plate of an oil tank receiving a main device of the apparatus therein, is characterized by disposing a looped weight beam near that part of the sound insulation panel on which the elastic body is installed. With such construction, noise can be effectively reduced while imparting a satisfactory supporting strength to the mounting part of the sound insulation panel. |
|
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION In order to sharply reduce the vibration of a sound insulation panel carried on a reinforcing channel through an elastic body, the inventor attempted to analyze the vibration system of the sound insulation panel.
Regarding the unit assembly of the sound insulation panel, the equation of motion has been set up as follows: [M]{x}+[C]{x}+[K]{x}=k.
multidot.
y (1) where [M]: mass matrix, [C]: damping matrix, [K]: rigidity matrix, {x}: accelerator vector, {x}: velocity vector, {x}: displacement vector, k: supporting spring constant, y: primitive translation.
By solving Equation (1), the vibration of the order r is expressed by the following equation: m.
sub.
r.
sup.
* q.
sub.
r +c.
sub.
r.
sup.
* q.
sub.
r +k.
sub.
r.
sup.
* q.
sub.
r ={.
phi.
.
sub.
r }.
sup.
T .
multidot.
k.
multidot.
y (2) where m.
sub.
r.
sup.
* : effective mass of order r (={.
phi.
.
sub.
r }.
sup.
T [M]{.
phi.
.
sub.
r }), c.
sub.
r.
sup.
* : damping of the order r (={.
phi.
.
sub.
r }.
sup.
T [C]{.
phi.
.
sub.
r }), k.
sub.
r.
sup.
* : spring constant of the order r (={.
phi.
.
sub.
r }.
sup.
T [K]{.
phi.
.
sub.
r }), {.
phi.
.
sub.
r }: characteristic vector of the order r, q.
sub.
r : displacement of the order r in a reference frame, q.
sub.
r : velocity of the order r in the reference frame (=dq.
sub.
r /dt), q.
sub.
r : acceleration of the order r in the reference frame (=d.
sup.
2 q.
sub.
r /dt.
sup.
2), {.
phi.
.
sub.
r }.
sup.
T : transposed vector of the characteristic vector of the order r.
The following relation holds between q.
sub.
r in Equation (2) and {x} in Equation (1): ##EQU1## When q.
sub.
r is evaluated from Equation (2) and then substituted into Equation (3), the steady response in Equation (1) is evaluated by the following equation: ##EQU2## where .
omega.
: exciting angular frequency (rad/s), .
omega.
.
sub.
r : characteristic angular frequency of the order r (rad/s), .
zeta.
: damping ratio.
As indicated by Equation (4), to the end of weakening the vibration of the sound insulation panel to be transmitted from the reinforcing channel (foundation), there are considered the two methods of making k small and making m
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Vibration and Earthquake Isolation 
